feat: 新增一些辅助的代码
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279
cmd/caiyun_parse/main.go
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279
cmd/caiyun_parse/main.go
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package main
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import (
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"bufio"
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"encoding/csv"
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"encoding/json"
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"flag"
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"fmt"
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"io"
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"os"
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"sort"
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"strings"
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"time"
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)
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// Minimal Caiyun hourly model focusing on required fields.
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type caiyunHourly struct {
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Status string `json:"status"`
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Result struct {
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Hourly struct {
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Status string `json:"status"`
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Temperature []valTime `json:"temperature"`
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Humidity []valTime `json:"humidity"`
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Visibility []valTime `json:"visibility"`
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Dswrf []valTime `json:"dswrf"`
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Pressure []valTime `json:"pressure"`
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Wind []windTime `json:"wind"`
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} `json:"hourly"`
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} `json:"result"`
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}
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type valTime struct {
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Datetime string `json:"datetime"`
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Value float64 `json:"value"`
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}
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type windTime struct {
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Datetime string `json:"datetime"`
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Speed float64 `json:"speed"`
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Direction float64 `json:"direction"`
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}
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type row struct {
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t time.Time
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temperature *float64
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humidity *float64
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windSpeed *float64
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windDir *float64
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pressure *float64
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visibility *float64
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dswrf *float64
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}
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func main() {
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var file string
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var tz string
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var mode string
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var alias string
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var lat float64
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var lon float64
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var sqlTable string
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flag.StringVar(&file, "file", "", "Path to Caiyun hourly JSON; if empty, read from stdin")
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flag.StringVar(&tz, "tz", "Asia/Shanghai", "Timezone for output timestamps")
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flag.StringVar(&mode, "mode", "csv", "Output mode: csv | sql")
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flag.StringVar(&alias, "alias", "", "Station alias for SQL output (required for mode=sql)")
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flag.Float64Var(&lat, "lat", 0, "Latitude for SQL output")
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flag.Float64Var(&lon, "lon", 0, "Longitude for SQL output")
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flag.StringVar(&sqlTable, "sqltable", "radar_weather", "SQL table name for inserts")
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flag.Parse()
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var r io.Reader
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if file == "" {
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r = bufio.NewReader(os.Stdin)
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} else {
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f, err := os.Open(file)
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if err != nil {
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fatalf("open file: %v", err)
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}
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defer f.Close()
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r = f
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}
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var payload caiyunHourly
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dec := json.NewDecoder(r)
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if err := dec.Decode(&payload); err != nil {
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fatalf("decode json: %v", err)
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}
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if strings.ToLower(payload.Status) != "ok" && payload.Status != "" {
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fatalf("top-level status not ok: %s", payload.Status)
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}
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loc, _ := time.LoadLocation(tz)
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if loc == nil {
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loc = time.FixedZone("CST", 8*3600)
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}
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// Merge series by timestamp
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rowsByTime := map[time.Time]*row{}
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upsert := func(ts string) *row {
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t, ok := parseTime(ts, loc)
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if !ok {
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fatalf("parse time failed: %s", ts)
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}
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if v, exists := rowsByTime[t]; exists {
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return v
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}
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nr := &row{t: t}
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rowsByTime[t] = nr
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return nr
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}
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for _, v := range payload.Result.Hourly.Temperature {
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rr := upsert(v.Datetime)
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rr.temperature = ptr(v.Value)
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}
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for _, v := range payload.Result.Hourly.Humidity {
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rr := upsert(v.Datetime)
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rr.humidity = ptr(v.Value)
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}
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for _, v := range payload.Result.Hourly.Visibility {
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rr := upsert(v.Datetime)
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rr.visibility = ptr(v.Value)
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}
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for _, v := range payload.Result.Hourly.Dswrf {
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rr := upsert(v.Datetime)
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rr.dswrf = ptr(v.Value)
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}
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for _, v := range payload.Result.Hourly.Pressure {
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rr := upsert(v.Datetime)
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rr.pressure = ptr(v.Value)
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}
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for _, w := range payload.Result.Hourly.Wind {
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rr := upsert(w.Datetime)
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rr.windSpeed = ptr(w.Speed)
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rr.windDir = ptr(w.Direction)
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}
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// Sort by time
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times := make([]time.Time, 0, len(rowsByTime))
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for t := range rowsByTime {
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times = append(times, t)
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}
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sort.Slice(times, func(i, j int) bool { return times[i].Before(times[j]) })
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if mode == "sql" {
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if alias == "" {
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fatalf("-alias is required for mode=sql")
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}
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// Emit upserts into radar_weather; convert wind_speed km/h -> m/s, keep humidity as ratio (0..1)
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fmt.Println("BEGIN;")
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for _, t := range times {
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rr := rowsByTime[t]
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// wind speed conversion
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var ws string
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if rr.windSpeed != nil {
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v := *rr.windSpeed / 3.6
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ws = trimZeros(fmt.Sprintf("%.6f", v))
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}
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// Build SQL with NULLs where missing
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q := fmt.Sprintf(
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"INSERT INTO %s (alias, lat, lon, dt, temperature, humidity, cloudrate, visibility, dswrf, wind_speed, wind_direction, pressure) "+
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"VALUES (%s, %s, %s, %s, %s, %s, NULL, %s, %s, %s, %s, %s) "+
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"ON CONFLICT (alias, dt) DO UPDATE SET "+
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"lat=EXCLUDED.lat, lon=EXCLUDED.lon, temperature=EXCLUDED.temperature, humidity=EXCLUDED.humidity, "+
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"visibility=EXCLUDED.visibility, dswrf=EXCLUDED.dswrf, wind_speed=EXCLUDED.wind_speed, "+
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"wind_direction=EXCLUDED.wind_direction, pressure=EXCLUDED.pressure;",
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sqlTable,
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sqlQuote(alias),
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sqlNum(lat),
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sqlNum(lon),
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sqlTime(t),
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sqlOpt(rr.temperature),
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sqlOpt(rr.humidity),
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sqlOpt(rr.visibility),
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sqlOpt(rr.dswrf),
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sqlStrOrNull(ws),
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sqlOpt(rr.windDir),
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sqlOpt(rr.pressure),
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)
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fmt.Println(q)
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}
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fmt.Println("COMMIT;")
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return
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}
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// CSV output
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w := csv.NewWriter(os.Stdout)
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_ = w.Write([]string{"datetime", "temperature", "humidity", "wind_speed", "wind_direction", "pressure", "visibility", "dswrf"})
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for _, t := range times {
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rr := rowsByTime[t]
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var ws string
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if rr.windSpeed != nil {
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v := *rr.windSpeed / 3.6
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ws = trimZeros(fmt.Sprintf("%.6f", v))
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}
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rec := []string{
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t.Format("2006-01-02 15:04:05"),
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optf(rr.temperature),
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optf(rr.humidity),
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ws,
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optf(rr.windDir),
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optf(rr.pressure),
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optf(rr.visibility),
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optf(rr.dswrf),
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}
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_ = w.Write(rec)
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}
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w.Flush()
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if err := w.Error(); err != nil {
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fatalf("write csv: %v", err)
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}
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}
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func ptr(f float64) *float64 { return &f }
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func optf(p *float64) string {
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if p == nil {
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return ""
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}
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// Trim trailing zeros via fmt
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return trimZeros(fmt.Sprintf("%.6f", *p))
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}
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func trimZeros(s string) string {
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if !strings.Contains(s, ".") {
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return s
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}
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s = strings.TrimRight(s, "0")
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s = strings.TrimRight(s, ".")
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return s
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}
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// parseTime attempts RFC3339 and common Caiyun formats without seconds.
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func parseTime(s string, loc *time.Location) (time.Time, bool) {
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// Try RFC3339 first
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if t, err := time.Parse(time.RFC3339, s); err == nil {
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return t.In(loc), true
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}
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// Try without seconds, with offset, e.g. 2006-01-02T15:04+08:00
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if t, err := time.Parse("2006-01-02T15:04-07:00", s); err == nil {
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return t.In(loc), true
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}
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// Try without offset (assume loc)
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if t, err := time.ParseInLocation("2006-01-02 15:04", s, loc); err == nil {
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return t.In(loc), true
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}
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return time.Time{}, false
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}
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func fatalf(format string, args ...any) {
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fmt.Fprintf(os.Stderr, format+"\n", args...)
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os.Exit(1)
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}
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func sqlQuote(s string) string {
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return "'" + strings.ReplaceAll(s, "'", "''") + "'"
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}
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func sqlNum(f float64) string {
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return trimZeros(fmt.Sprintf("%.8f", f))
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}
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func sqlTime(t time.Time) string {
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return sqlQuote(t.Format("2006-01-02 15:04:05"))
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}
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func sqlOpt(p *float64) string {
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if p == nil {
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return "NULL"
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}
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return trimZeros(fmt.Sprintf("%.6f", *p))
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}
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func sqlStrOrNull(s string) string {
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if s == "" {
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return "NULL"
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}
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return s
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}
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448
cmd/radar_export_csv/main.go
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448
cmd/radar_export_csv/main.go
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@ -0,0 +1,448 @@
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package main
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import (
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"context"
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"database/sql"
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"encoding/binary"
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"encoding/csv"
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"errors"
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"flag"
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"fmt"
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"log"
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"math"
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"os"
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"strings"
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"time"
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"weatherstation/internal/database"
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)
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type stationInfo struct {
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ID string
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Alias string
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Lat float64
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Lon float64
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Z int
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Y int
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X int
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}
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type tileRec struct {
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DT time.Time
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Width, Height int
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West, South float64
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East, North float64
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ResDeg float64
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Data []byte
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}
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func main() {
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var stationID string
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var startStr string
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var endStr string
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var outPath string
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var verbose bool
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flag.StringVar(&stationID, "station_id", "", "站点ID（留空表示全部WH65LP且有经纬度的站）")
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flag.StringVar(&startStr, "start", "", "起始时间（YYYY-MM-DD HH:MM:SS，CST）")
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flag.StringVar(&endStr, "end", "", "结束时间（YYYY-MM-DD HH:MM:SS，CST）")
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flag.StringVar(&outPath, "out", "radar_stats.csv", "输出CSV文件路径")
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flag.BoolVar(&verbose, "info", false, "输出详细过程信息")
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flag.Parse()
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if strings.TrimSpace(startStr) == "" || strings.TrimSpace(endStr) == "" {
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log.Fatalln("必须提供 --start 与 --end，格式 YYYY-MM-DD HH:MM:SS")
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}
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loc, _ := time.LoadLocation("Asia/Shanghai")
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if loc == nil {
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loc = time.FixedZone("CST", 8*3600)
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}
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startT, err := time.ParseInLocation("2006-01-02 15:04:05", startStr, loc)
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if err != nil {
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log.Fatalf("解析 start 失败: %v", err)
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}
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endT, err := time.ParseInLocation("2006-01-02 15:04:05", endStr, loc)
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if err != nil {
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log.Fatalf("解析 end 失败: %v", err)
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}
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if !endT.After(startT) {
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log.Fatalln("结束时间必须大于起始时间")
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}
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// 初始化数据库
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_ = database.GetDB()
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defer database.Close()
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// 获取站点列表
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stations, err := listStations(database.GetDB(), stationID)
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if err != nil {
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log.Fatalf("查询站点失败: %v", err)
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}
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if len(stations) == 0 {
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log.Fatalln("没有符合条件的站点")
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}
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if verbose {
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log.Printf("站点数量: %d", len(stations))
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for _, s := range stations {
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log.Printf("站点: id=%s alias=%s lat=%.5f lon=%.5f z/y/x=%d/%d/%d", s.ID, s.Alias, s.Lat, s.Lon, s.Z, s.Y, s.X)
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}
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}
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// 创建CSV
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f, err := os.Create(outPath)
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if err != nil {
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log.Fatalf("创建输出文件失败: %v", err)
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}
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defer f.Close()
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w := csv.NewWriter(f)
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defer w.Flush()
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header := []string{
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"station_id", "station_alias", "dt", "lat", "lon", "wind_speed_ms", "wind_dir_deg",
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"sector_ge40_cnt", "sector_ge40_sum", "sector_ge30_cnt", "sector_ge30_sum",
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"circle_ge40_cnt", "circle_ge40_sum", "circle_ge30_cnt", "circle_ge30_sum",
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"rs485_rain_total_mm",
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}
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if err := w.Write(header); err != nil {
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log.Fatalf("写入CSV表头失败: %v", err)
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}
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ctx := context.Background()
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totalRows := 0
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var totalTiles, skipNoZYX, skipNoWind, skipDecode int
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for _, s := range stations {
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if s.Z == 0 && s.Y == 0 && s.X == 0 {
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log.Printf("跳过站点 %s（无z/y/x映射）", s.ID)
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skipNoZYX++
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continue
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}
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tiles, err := listTiles(ctx, database.GetDB(), s.Z, s.Y, s.X, startT, endT)
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if err != nil {
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log.Printf("查询瓦片失败 station=%s: %v", s.ID, err)
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continue
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}
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totalTiles += len(tiles)
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if verbose {
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log.Printf("站点 %s 瓦片数量: %d", s.ID, len(tiles))
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}
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if len(tiles) == 0 {
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log.Printf("站点 %s 在范围内无瓦片", s.ID)
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}
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for _, t := range tiles {
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// 10分钟向下取整时间（bucket）
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bucket := bucket10(t.DT, loc)
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// NOTE: 按需改为用 station_id 匹配 radar_weather.alias
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windSpeed, windDir, ok, err := loadWindAt(database.GetDB(), s.ID, bucket)
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if err != nil {
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log.Printf("读取风失败 %s @%s: %v", s.ID, t.DT.Format(time.RFC3339), err)
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continue
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}
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if !ok { // 无风场：跳过该时次
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skipNoWind++
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if verbose {
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log.Printf("跳过: %s 瓦片@%s（桶=%s）在 radar_weather(alias=%s) 无记录", s.ID, t.DT.In(loc).Format("2006-01-02 15:04:05"), bucket.Format("2006-01-02 15:04:05"), s.ID)
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}
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continue
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}
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// 解码 dBZ 网格
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vals, xs, ys, err := decodeTile(t)
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if err != nil {
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log.Printf("解码瓦片失败 %s @%s: %v", s.ID, t.DT.Format(time.RFC3339), err)
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skipDecode++
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continue
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}
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// 统计
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sec40Cnt, sec40Sum, sec30Cnt, sec30Sum,
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cir40Cnt, cir40Sum, cir30Cnt, cir30Sum := computeStats(vals, xs, ys, s.Lat, s.Lon, windSpeed, windDir)
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// 最近一条累计雨量
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rainTotal, rainOK := loadNearestRain(database.GetDB(), s.ID, t.DT)
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if verbose {
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log.Printf("写出: %s dt=%s wind=%.3f m/s %.1f° 扇形(>=40:%d/%.1f >=30:%d/%.1f) 圆形(>=40:%d/%.1f >=30:%d/%.1f) rain_total=%v(%.3f)",
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s.ID,
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t.DT.In(loc).Format("2006-01-02 15:04:05"),
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windSpeed, windDir,
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sec40Cnt, sec40Sum, sec30Cnt, sec30Sum,
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cir40Cnt, cir40Sum, cir30Cnt, cir30Sum,
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rainOK, rainTotal,
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)
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}
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rec := []string{
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s.ID,
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s.Alias,
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t.DT.In(loc).Format("2006-01-02 15:04:05"),
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fmt.Sprintf("%.6f", s.Lat),
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fmt.Sprintf("%.6f", s.Lon),
|
||||
fmt.Sprintf("%.3f", windSpeed),
|
||||
fmt.Sprintf("%.2f", windDir),
|
||||
fmt.Sprintf("%d", sec40Cnt),
|
||||
fmt.Sprintf("%.1f", sec40Sum),
|
||||
fmt.Sprintf("%d", sec30Cnt),
|
||||
fmt.Sprintf("%.1f", sec30Sum),
|
||||
fmt.Sprintf("%d", cir40Cnt),
|
||||
fmt.Sprintf("%.1f", cir40Sum),
|
||||
fmt.Sprintf("%d", cir30Cnt),
|
||||
fmt.Sprintf("%.1f", cir30Sum),
|
||||
fmt.Sprintf("%.3f", rainTotal),
|
||||
}
|
||||
if err := w.Write(rec); err != nil {
|
||||
log.Printf("写入CSV失败: %v", err)
|
||||
}
|
||||
totalRows++
|
||||
}
|
||||
}
|
||||
w.Flush()
|
||||
if err := w.Error(); err != nil {
|
||||
log.Fatalf("写入CSV失败: %v", err)
|
||||
}
|
||||
if verbose {
|
||||
log.Printf("汇总: 站点数=%d 瓦片总数=%d 跳过(无z/y/x)=%d 跳过(无风)=%d 跳过(解码失败)=%d", len(stations), totalTiles, skipNoZYX, skipNoWind, skipDecode)
|
||||
}
|
||||
log.Printf("完成，输出 %d 行到 %s", totalRows, outPath)
|
||||
}
|
||||
|
||||
func listStations(db *sql.DB, stationID string) ([]stationInfo, error) {
|
||||
// 与前端一致：device_type='WH65LP' 且 lat/lon 非空且非零
|
||||
if strings.TrimSpace(stationID) != "" {
|
||||
const q = `
|
||||
SELECT station_id,
|
||||
CASE WHEN COALESCE(station_alias,'')='' THEN station_id ELSE station_alias END AS alias,
|
||||
latitude, longitude,
|
||||
COALESCE(z,0), COALESCE(y,0), COALESCE(x,0)
|
||||
FROM stations
|
||||
WHERE device_type='WH65LP' AND station_id=$1
|
||||
AND latitude IS NOT NULL AND longitude IS NOT NULL
|
||||
AND latitude<>0 AND longitude<>0`
|
||||
var s stationInfo
|
||||
err := db.QueryRow(q, stationID).Scan(&s.ID, &s.Alias, &s.Lat, &s.Lon, &s.Z, &s.Y, &s.X)
|
||||
if err != nil {
|
||||
if errors.Is(err, sql.ErrNoRows) {
|
||||
return nil, nil
|
||||
}
|
||||
return nil, err
|
||||
}
|
||||
return []stationInfo{s}, nil
|
||||
}
|
||||
const qAll = `
|
||||
SELECT station_id,
|
||||
CASE WHEN COALESCE(station_alias,'')='' THEN station_id ELSE station_alias END AS alias,
|
||||
latitude, longitude,
|
||||
COALESCE(z,0), COALESCE(y,0), COALESCE(x,0)
|
||||
FROM stations
|
||||
WHERE device_type='WH65LP'
|
||||
AND latitude IS NOT NULL AND longitude IS NOT NULL
|
||||
AND latitude<>0 AND longitude<>0
|
||||
ORDER BY station_id`
|
||||
rows, err := db.Query(qAll)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer rows.Close()
|
||||
var out []stationInfo
|
||||
for rows.Next() {
|
||||
var s stationInfo
|
||||
if err := rows.Scan(&s.ID, &s.Alias, &s.Lat, &s.Lon, &s.Z, &s.Y, &s.X); err == nil {
|
||||
out = append(out, s)
|
||||
}
|
||||
}
|
||||
return out, nil
|
||||
}
|
||||
|
||||
func listTiles(ctx context.Context, db *sql.DB, z, y, x int, from, to time.Time) ([]tileRec, error) {
|
||||
const q = `
|
||||
SELECT dt, width, height, west, south, east, north, res_deg, data
|
||||
FROM radar_tiles
|
||||
WHERE z=$1 AND y=$2 AND x=$3 AND dt BETWEEN $4 AND $5
|
||||
ORDER BY dt ASC`
|
||||
rows, err := db.QueryContext(ctx, q, z, y, x, from, to)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer rows.Close()
|
||||
var out []tileRec
|
||||
for rows.Next() {
|
||||
var r tileRec
|
||||
if err := rows.Scan(&r.DT, &r.Width, &r.Height, &r.West, &r.South, &r.East, &r.North, &r.ResDeg, &r.Data); err == nil {
|
||||
out = append(out, r)
|
||||
}
|
||||
}
|
||||
return out, nil
|
||||
}
|
||||
|
||||
func bucket10(t time.Time, loc *time.Location) time.Time {
|
||||
tt := t.In(loc)
|
||||
m := (tt.Minute() / 10) * 10
|
||||
return time.Date(tt.Year(), tt.Month(), tt.Day(), tt.Hour(), m, 0, 0, loc)
|
||||
}
|
||||
|
||||
// loadWindAt 以别名(alias)精确匹配 radar_weather；本导出按需传入 station_id 作为 alias 参数
|
||||
func loadWindAt(db *sql.DB, alias string, dt time.Time) (speedMS float64, dirDeg float64, ok bool, err error) {
|
||||
const q = `
|
||||
SELECT wind_speed, wind_direction
|
||||
FROM radar_weather
|
||||
WHERE alias=$1 AND dt=$2
|
||||
LIMIT 1`
|
||||
var s, d sql.NullFloat64
|
||||
err = db.QueryRow(q, alias, dt).Scan(&s, &d)
|
||||
if err == sql.ErrNoRows {
|
||||
return 0, 0, false, nil
|
||||
}
|
||||
if err != nil {
|
||||
return 0, 0, false, err
|
||||
}
|
||||
if !s.Valid || !d.Valid {
|
||||
return 0, 0, false, nil
|
||||
}
|
||||
return s.Float64, d.Float64, true, nil
|
||||
}
|
||||
|
||||
func loadNearestRain(db *sql.DB, stationID string, dt time.Time) (rainTotal float64, ok bool) {
|
||||
// 取最近一条累计雨量（单位mm）。如不存在返回0,false
|
||||
const q = `
|
||||
SELECT rainfall
|
||||
FROM rs485_weather_data
|
||||
WHERE station_id=$1
|
||||
ORDER BY ABS(EXTRACT(EPOCH FROM (timestamp - $2))) ASC
|
||||
LIMIT 1`
|
||||
var r sql.NullFloat64
|
||||
if err := db.QueryRow(q, stationID, dt).Scan(&r); err != nil {
|
||||
return 0, false
|
||||
}
|
||||
if !r.Valid {
|
||||
return 0, false
|
||||
}
|
||||
return r.Float64, true
|
||||
}
|
||||
|
||||
func decodeTile(t tileRec) (vals [][]*float64, xs []float64, ys []float64, err error) {
|
||||
w, h := t.Width, t.Height
|
||||
if w <= 0 || h <= 0 {
|
||||
return nil, nil, nil, fmt.Errorf("非法尺寸")
|
||||
}
|
||||
if len(t.Data) < w*h*2 {
|
||||
return nil, nil, nil, fmt.Errorf("数据长度不足")
|
||||
}
|
||||
xs = make([]float64, w)
|
||||
for c := 0; c < w; c++ {
|
||||
xs[c] = t.West + (float64(c)+0.5)*t.ResDeg
|
||||
}
|
||||
ys = make([]float64, h)
|
||||
for r := 0; r < h; r++ {
|
||||
ys[r] = t.South + (float64(r)+0.5)*t.ResDeg
|
||||
}
|
||||
vals = make([][]*float64, h)
|
||||
off := 0
|
||||
for r := 0; r < h; r++ {
|
||||
row := make([]*float64, w)
|
||||
for c := 0; c < w; c++ {
|
||||
v := int16(binary.BigEndian.Uint16(t.Data[off : off+2]))
|
||||
off += 2
|
||||
if v >= 32766 {
|
||||
row[c] = nil
|
||||
continue
|
||||
}
|
||||
dbz := float64(v) / 10.0
|
||||
if dbz < 0 {
|
||||
dbz = 0
|
||||
} else if dbz > 75 {
|
||||
dbz = 75
|
||||
}
|
||||
vv := dbz
|
||||
row[c] = &vv
|
||||
}
|
||||
vals[r] = row
|
||||
}
|
||||
return vals, xs, ys, nil
|
||||
}
|
||||
|
||||
func computeStats(vals [][]*float64, xs, ys []float64, stLat, stLon, windMS, windFromDeg float64) (
|
||||
sec40Cnt int, sec40Sum float64, sec30Cnt int, sec30Sum float64,
|
||||
cir40Cnt int, cir40Sum float64, cir30Cnt int, cir30Sum float64,
|
||||
) {
|
||||
h := len(vals)
|
||||
if h == 0 {
|
||||
return
|
||||
}
|
||||
w := len(vals[0])
|
||||
// 半径（米）与半角
|
||||
halfAngle := 30.0
|
||||
rangeM := windMS * 3 * 3600
|
||||
circleR := 8000.0
|
||||
|
||||
for r := 0; r < h; r++ {
|
||||
lat := ys[r]
|
||||
row := vals[r]
|
||||
for c := 0; c < w; c++ {
|
||||
if row[c] == nil {
|
||||
continue
|
||||
}
|
||||
dbz := *row[c]
|
||||
lon := xs[c]
|
||||
dist := haversine(stLat, stLon, lat, lon)
|
||||
|
||||
// 8km 圆
|
||||
if dist <= circleR {
|
||||
if dbz >= 40 {
|
||||
cir40Cnt++
|
||||
cir40Sum += dbz
|
||||
}
|
||||
if dbz >= 30 {
|
||||
cir30Cnt++
|
||||
cir30Sum += dbz
|
||||
}
|
||||
}
|
||||
|
||||
// 扇形（需同时满足距离与角度）
|
||||
if dist <= rangeM {
|
||||
brg := bearingDeg(stLat, stLon, lat, lon)
|
||||
if angDiff(brg, windFromDeg) <= halfAngle {
|
||||
if dbz >= 40 {
|
||||
sec40Cnt++
|
||||
sec40Sum += dbz
|
||||
}
|
||||
if dbz >= 30 {
|
||||
sec30Cnt++
|
||||
sec30Sum += dbz
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func toRad(d float64) float64 { return d * math.Pi / 180 }
|
||||
func toDeg(r float64) float64 { return r * 180 / math.Pi }
|
||||
|
||||
func haversine(lat1, lon1, lat2, lon2 float64) float64 {
|
||||
const R = 6371000.0
|
||||
dLat := toRad(lat2 - lat1)
|
||||
dLon := toRad(lon2 - lon1)
|
||||
a := math.Sin(dLat/2)*math.Sin(dLat/2) + math.Cos(toRad(lat1))*math.Cos(toRad(lat2))*math.Sin(dLon/2)*math.Sin(dLon/2)
|
||||
c := 2 * math.Atan2(math.Sqrt(a), math.Sqrt(1-a))
|
||||
return R * c
|
||||
}
|
||||
|
||||
func bearingDeg(lat1, lon1, lat2, lon2 float64) float64 {
|
||||
φ1 := toRad(lat1)
|
||||
φ2 := toRad(lat2)
|
||||
Δλ := toRad(lon2 - lon1)
|
||||
y := math.Sin(Δλ) * math.Cos(φ2)
|
||||
x := math.Cos(φ1)*math.Sin(φ2) - math.Sin(φ1)*math.Cos(φ2)*math.Cos(Δλ)
|
||||
brg := toDeg(math.Atan2(y, x))
|
||||
if brg < 0 {
|
||||
brg += 360
|
||||
}
|
||||
return brg
|
||||
}
|
||||
|
||||
func angDiff(a, b float64) float64 {
|
||||
d := math.Mod(a-b+540, 360) - 180
|
||||
if d < 0 {
|
||||
d = -d
|
||||
}
|
||||
return math.Abs(d)
|
||||
}
|
||||
553
cmd/radar_rain_export_csv/main.go
Normal file
553
cmd/radar_rain_export_csv/main.go
Normal file
@ -0,0 +1,553 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"context"
|
||||
"database/sql"
|
||||
"encoding/binary"
|
||||
"encoding/csv"
|
||||
"errors"
|
||||
"flag"
|
||||
"fmt"
|
||||
"log"
|
||||
"math"
|
||||
"os"
|
||||
"strings"
|
||||
"time"
|
||||
|
||||
"weatherstation/internal/database"
|
||||
)
|
||||
|
||||
type stationInfo struct {
|
||||
ID string
|
||||
Alias string
|
||||
Lat float64
|
||||
Lon float64
|
||||
Z int
|
||||
Y int
|
||||
X int
|
||||
}
|
||||
|
||||
type tileRec struct {
|
||||
DT time.Time
|
||||
Width, Height int
|
||||
West, South float64
|
||||
East, North float64
|
||||
ResDeg float64
|
||||
Data []byte
|
||||
}
|
||||
|
||||
func main() {
|
||||
var stationID string
|
||||
var startStr string
|
||||
var endStr string
|
||||
var outPath string
|
||||
var verbose bool
|
||||
var useImdroid bool
|
||||
|
||||
flag.StringVar(&stationID, "station_id", "", "站点ID（留空表示全部符合条件的站）")
|
||||
flag.StringVar(&startStr, "start", "", "起始时间（YYYY-MM-DD HH:MM:SS，CST，表示区间左端点）")
|
||||
flag.StringVar(&endStr, "end", "", "结束时间（YYYY-MM-DD HH:MM:SS，CST，表示区间左端点，非包含）")
|
||||
flag.StringVar(&outPath, "out", "radar_hourly_stats.csv", "输出CSV文件路径")
|
||||
flag.BoolVar(&verbose, "info", false, "输出详细过程信息")
|
||||
flag.BoolVar(&useImdroid, "use_imdroid", false, "输出 imdroid 预报（右端点）")
|
||||
flag.Parse()
|
||||
|
||||
if strings.TrimSpace(startStr) == "" || strings.TrimSpace(endStr) == "" {
|
||||
log.Fatalln("必须提供 --start 与 --end，格式 YYYY-MM-DD HH:MM:SS")
|
||||
}
|
||||
loc, _ := time.LoadLocation("Asia/Shanghai")
|
||||
if loc == nil {
|
||||
loc = time.FixedZone("CST", 8*3600)
|
||||
}
|
||||
startT, err := time.ParseInLocation("2006-01-02 15:04:05", startStr, loc)
|
||||
if err != nil {
|
||||
log.Fatalf("解析 start 失败: %v", err)
|
||||
}
|
||||
endT, err := time.ParseInLocation("2006-01-02 15:04:05", endStr, loc)
|
||||
if err != nil {
|
||||
log.Fatalf("解析 end 失败: %v", err)
|
||||
}
|
||||
if !endT.After(startT) {
|
||||
log.Fatalln("结束时间必须大于起始时间")
|
||||
}
|
||||
|
||||
_ = database.GetDB()
|
||||
defer database.Close()
|
||||
|
||||
stations, err := listStations(database.GetDB(), stationID)
|
||||
if err != nil {
|
||||
log.Fatalf("查询站点失败: %v", err)
|
||||
}
|
||||
if len(stations) == 0 {
|
||||
log.Fatalln("没有符合条件的站点")
|
||||
}
|
||||
if verbose {
|
||||
log.Printf("站点数量: %d", len(stations))
|
||||
for _, s := range stations {
|
||||
log.Printf("站点: id=%s alias=%s lat=%.5f lon=%.5f z/y/x=%d/%d/%d", s.ID, s.Alias, s.Lat, s.Lon, s.Z, s.Y, s.X)
|
||||
}
|
||||
}
|
||||
|
||||
f, err := os.Create(outPath)
|
||||
if err != nil {
|
||||
log.Fatalf("创建输出文件失败: %v", err)
|
||||
}
|
||||
defer f.Close()
|
||||
w := csv.NewWriter(f)
|
||||
defer w.Flush()
|
||||
|
||||
header := []string{
|
||||
"station_id",
|
||||
"station_alias",
|
||||
"hour_end",
|
||||
"rain_actual_mm",
|
||||
"wind_speed_ms",
|
||||
"wind_dir_deg",
|
||||
"openmeteo_rain_mm",
|
||||
"openmeteo_issued",
|
||||
"caiyun_rain_mm",
|
||||
"caiyun_issued",
|
||||
}
|
||||
if useImdroid {
|
||||
header = append(header, "imdroid_rain_mm", "imdroid_issued")
|
||||
}
|
||||
header = append(header, "radar_circle_max_dbz", "radar_sector_max_dbz")
|
||||
if err := w.Write(header); err != nil {
|
||||
log.Fatalf("写入CSV表头失败: %v", err)
|
||||
}
|
||||
|
||||
ctx := context.Background()
|
||||
totalRows := 0
|
||||
hours := buildHourSlots(startT, endT)
|
||||
|
||||
for _, s := range stations {
|
||||
if verbose {
|
||||
log.Printf("处理站点 %s，共 %d 个小时区间", s.ID, len(hours))
|
||||
}
|
||||
for _, slot := range hours {
|
||||
actual, windSpeed, windDir, hasObs, err := aggregateHourlyObs(ctx, database.GetDB(), s.ID, slot.from, slot.to)
|
||||
if err != nil {
|
||||
log.Printf("站点 %s 聚合观测失败 @%s: %v", s.ID, slot.to.Format(time.RFC3339), err)
|
||||
continue
|
||||
}
|
||||
|
||||
openRain, openIssued, hasOpen, err := findLatestForecast(ctx, database.GetDB(), s.ID, "open-meteo", slot.to)
|
||||
if err != nil {
|
||||
log.Printf("站点 %s 读取 open-meteo 预报失败 @%s: %v", s.ID, slot.to.Format(time.RFC3339), err)
|
||||
}
|
||||
caiyunRain, caiyunIssued, hasCaiyun, err := findLatestForecast(ctx, database.GetDB(), s.ID, "caiyun", slot.to)
|
||||
if err != nil {
|
||||
log.Printf("站点 %s 读取 caiyun 预报失败 @%s: %v", s.ID, slot.to.Format(time.RFC3339), err)
|
||||
}
|
||||
|
||||
var (
|
||||
imdroidRain float64
|
||||
imdroidIssued time.Time
|
||||
hasImdroid bool
|
||||
)
|
||||
if useImdroid {
|
||||
var errImdroid error
|
||||
imdroidRain, imdroidIssued, hasImdroid, errImdroid = findLatestForecast(ctx, database.GetDB(), s.ID, "imdroid", slot.to)
|
||||
if errImdroid != nil {
|
||||
log.Printf("站点 %s 读取 imdroid 预报失败 @%s: %v", s.ID, slot.to.Format(time.RFC3339), errImdroid)
|
||||
}
|
||||
}
|
||||
|
||||
circleMax, sectorMax, hasRadar, err := hourlyRadarMax(ctx, database.GetDB(), s, slot.from, slot.to, loc, verbose)
|
||||
if err != nil {
|
||||
log.Printf("站点 %s 统计雷达失败 @%s: %v", s.ID, slot.to.Format(time.RFC3339), err)
|
||||
}
|
||||
|
||||
rec := []string{
|
||||
s.ID,
|
||||
s.Alias,
|
||||
slot.to.Format("2006-01-02 15:04:05"),
|
||||
formatFloat(actual, hasObs, 3),
|
||||
formatFloat(windSpeed, hasObs && !math.IsNaN(windSpeed), 3),
|
||||
formatFloat(windDir, hasObs && !math.IsNaN(windDir), 1),
|
||||
formatFloat(openRain, hasOpen, 3),
|
||||
formatTime(openIssued, hasOpen),
|
||||
formatFloat(caiyunRain, hasCaiyun, 3),
|
||||
formatTime(caiyunIssued, hasCaiyun),
|
||||
}
|
||||
if useImdroid {
|
||||
rec = append(rec,
|
||||
formatFloat(imdroidRain, hasImdroid, 3),
|
||||
formatTime(imdroidIssued, hasImdroid),
|
||||
)
|
||||
}
|
||||
rec = append(rec,
|
||||
formatFloat(circleMax, hasRadar && !math.IsNaN(circleMax), 1),
|
||||
formatFloat(sectorMax, hasRadar && !math.IsNaN(sectorMax), 1),
|
||||
)
|
||||
if err := w.Write(rec); err != nil {
|
||||
log.Printf("写入CSV失败: %v", err)
|
||||
} else {
|
||||
totalRows++
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
w.Flush()
|
||||
if err := w.Error(); err != nil {
|
||||
log.Fatalf("写入CSV失败: %v", err)
|
||||
}
|
||||
log.Printf("完成，输出 %d 行到 %s", totalRows, outPath)
|
||||
}
|
||||
|
||||
type hourSlot struct {
|
||||
from time.Time
|
||||
to time.Time
|
||||
}
|
||||
|
||||
func buildHourSlots(from, to time.Time) []hourSlot {
|
||||
var slots []hourSlot
|
||||
cursor := from
|
||||
for cursor.Before(to) {
|
||||
end := cursor.Add(time.Hour)
|
||||
if end.After(to) {
|
||||
end = to
|
||||
}
|
||||
slots = append(slots, hourSlot{from: cursor, to: end})
|
||||
cursor = end
|
||||
}
|
||||
return slots
|
||||
}
|
||||
|
||||
func listStations(db *sql.DB, stationID string) ([]stationInfo, error) {
|
||||
if strings.TrimSpace(stationID) != "" {
|
||||
const q = `
|
||||
SELECT station_id,
|
||||
CASE WHEN COALESCE(station_alias,'')='' THEN station_id ELSE station_alias END AS alias,
|
||||
latitude, longitude,
|
||||
COALESCE(z,0), COALESCE(y,0), COALESCE(x,0)
|
||||
FROM stations
|
||||
WHERE station_id=$1
|
||||
AND latitude IS NOT NULL AND longitude IS NOT NULL
|
||||
AND latitude<>0 AND longitude<>0
|
||||
AND COALESCE(z,0)=7 AND COALESCE(y,0)=40 AND COALESCE(x,0)=102`
|
||||
var s stationInfo
|
||||
err := db.QueryRow(q, stationID).Scan(&s.ID, &s.Alias, &s.Lat, &s.Lon, &s.Z, &s.Y, &s.X)
|
||||
if err != nil {
|
||||
if errors.Is(err, sql.ErrNoRows) {
|
||||
return nil, nil
|
||||
}
|
||||
return nil, err
|
||||
}
|
||||
return []stationInfo{s}, nil
|
||||
}
|
||||
const qAll = `
|
||||
SELECT station_id,
|
||||
CASE WHEN COALESCE(station_alias,'')='' THEN station_id ELSE station_alias END AS alias,
|
||||
latitude, longitude,
|
||||
COALESCE(z,0), COALESCE(y,0), COALESCE(x,0)
|
||||
FROM stations
|
||||
WHERE device_type='WH65LP'
|
||||
AND latitude IS NOT NULL AND longitude IS NOT NULL
|
||||
AND latitude<>0 AND longitude<>0
|
||||
AND COALESCE(z,0)=7 AND COALESCE(y,0)=40 AND COALESCE(x,0)=102
|
||||
ORDER BY station_id`
|
||||
rows, err := db.Query(qAll)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer rows.Close()
|
||||
var out []stationInfo
|
||||
for rows.Next() {
|
||||
var s stationInfo
|
||||
if err := rows.Scan(&s.ID, &s.Alias, &s.Lat, &s.Lon, &s.Z, &s.Y, &s.X); err == nil {
|
||||
out = append(out, s)
|
||||
}
|
||||
}
|
||||
return out, nil
|
||||
}
|
||||
|
||||
func aggregateHourlyObs(ctx context.Context, db *sql.DB, stationID string, from, to time.Time) (rain float64, windSpeed float64, windDir float64, ok bool, err error) {
|
||||
const q = `
|
||||
SELECT wind_speed_ms_x1000, wind_dir_deg, rain_10m_mm_x1000
|
||||
FROM rs485_weather_10min
|
||||
WHERE station_id=$1 AND bucket_start >= $2 AND bucket_start < $3`
|
||||
rows, err := db.QueryContext(ctx, q, stationID, from, to)
|
||||
if err != nil {
|
||||
return 0, 0, 0, false, err
|
||||
}
|
||||
defer rows.Close()
|
||||
|
||||
var totalRain int64
|
||||
var count int
|
||||
var sumX, sumY float64
|
||||
|
||||
for rows.Next() {
|
||||
var ws sql.NullInt64
|
||||
var wd sql.NullInt64
|
||||
var rainX sql.NullInt64
|
||||
if err := rows.Scan(&ws, &wd, &rainX); err != nil {
|
||||
return 0, 0, 0, false, err
|
||||
}
|
||||
if rainX.Valid {
|
||||
totalRain += rainX.Int64
|
||||
}
|
||||
if ws.Valid && wd.Valid {
|
||||
speed := float64(ws.Int64) / 1000.0
|
||||
dir := float64(wd.Int64)
|
||||
rad := toRad(dir)
|
||||
sumX += speed * math.Cos(rad)
|
||||
sumY += speed * math.Sin(rad)
|
||||
count++
|
||||
}
|
||||
}
|
||||
if err := rows.Err(); err != nil {
|
||||
return 0, 0, 0, false, err
|
||||
}
|
||||
|
||||
rain = float64(totalRain) / 1000.0
|
||||
windSpeed = math.NaN()
|
||||
windDir = math.NaN()
|
||||
if count > 0 {
|
||||
avgX := sumX / float64(count)
|
||||
avgY := sumY / float64(count)
|
||||
windSpeed = math.Hypot(avgX, avgY)
|
||||
if windSpeed == 0 {
|
||||
windDir = 0
|
||||
} else {
|
||||
dir := toDeg(math.Atan2(avgY, avgX))
|
||||
if dir < 0 {
|
||||
dir += 360
|
||||
}
|
||||
windDir = dir
|
||||
}
|
||||
ok = true
|
||||
}
|
||||
return rain, windSpeed, windDir, totalRain > 0 || count > 0, nil
|
||||
}
|
||||
|
||||
func findLatestForecast(ctx context.Context, db *sql.DB, stationID, provider string, forecastTime time.Time) (rain float64, issued time.Time, ok bool, err error) {
|
||||
const q = `
|
||||
SELECT issued_at, rain_mm_x1000
|
||||
FROM forecast_hourly
|
||||
WHERE station_id=$1 AND provider=$2 AND forecast_time=$3
|
||||
ORDER BY issued_at DESC
|
||||
LIMIT 1`
|
||||
var issuedAt time.Time
|
||||
var rainX sql.NullInt64
|
||||
err = db.QueryRowContext(ctx, q, stationID, provider, forecastTime).Scan(&issuedAt, &rainX)
|
||||
if err != nil {
|
||||
if errors.Is(err, sql.ErrNoRows) {
|
||||
return 0, time.Time{}, false, nil
|
||||
}
|
||||
return 0, time.Time{}, false, err
|
||||
}
|
||||
if !rainX.Valid {
|
||||
return 0, issuedAt, true, nil
|
||||
}
|
||||
return float64(rainX.Int64) / 1000.0, issuedAt, true, nil
|
||||
}
|
||||
|
||||
func hourlyRadarMax(ctx context.Context, db *sql.DB, s stationInfo, from, to time.Time, loc *time.Location, verbose bool) (circleMax float64, sectorMax float64, ok bool, err error) {
|
||||
tiles, err := listTiles(ctx, db, s.Z, s.Y, s.X, from, to)
|
||||
if err != nil {
|
||||
return math.NaN(), math.NaN(), false, err
|
||||
}
|
||||
if len(tiles) == 0 {
|
||||
return math.NaN(), math.NaN(), false, nil
|
||||
}
|
||||
circleMax = math.NaN()
|
||||
sectorMax = math.NaN()
|
||||
alias := strings.TrimSpace(s.Alias)
|
||||
if alias == "" {
|
||||
alias = s.ID
|
||||
}
|
||||
|
||||
for _, t := range tiles {
|
||||
bucket := bucket10(t.DT, loc)
|
||||
windSpeed, windDir, windOK, err := loadWindAt(db, s.ID, alias, bucket)
|
||||
if err != nil {
|
||||
if verbose {
|
||||
log.Printf("站点 %s 瓦片@%s 读取风失败: %v", s.ID, t.DT.Format(time.RFC3339), err)
|
||||
}
|
||||
continue
|
||||
}
|
||||
|
||||
vals, xs, ys, err := decodeTile(t)
|
||||
if err != nil {
|
||||
if verbose {
|
||||
log.Printf("站点 %s 解码瓦片失败: %v", s.ID, err)
|
||||
}
|
||||
continue
|
||||
}
|
||||
|
||||
for r := 0; r < len(vals); r++ {
|
||||
row := vals[r]
|
||||
lat := ys[r]
|
||||
for c := 0; c < len(row); c++ {
|
||||
v := row[c]
|
||||
if v == nil {
|
||||
continue
|
||||
}
|
||||
dbz := *v
|
||||
lon := xs[c]
|
||||
dist := haversine(s.Lat, s.Lon, lat, lon)
|
||||
|
||||
if dist <= 8000.0 {
|
||||
if math.IsNaN(circleMax) || dbz > circleMax {
|
||||
circleMax = dbz
|
||||
}
|
||||
}
|
||||
|
||||
if windOK && windSpeed > 0 {
|
||||
brg := bearingDeg(s.Lat, s.Lon, lat, lon)
|
||||
if angDiff(brg, windDir) <= 30.0 && dist <= windSpeed*3*3600 {
|
||||
if math.IsNaN(sectorMax) || dbz > sectorMax {
|
||||
sectorMax = dbz
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return circleMax, sectorMax, !math.IsNaN(circleMax) || !math.IsNaN(sectorMax), nil
|
||||
}
|
||||
|
||||
func listTiles(ctx context.Context, db *sql.DB, z, y, x int, from, to time.Time) ([]tileRec, error) {
|
||||
const q = `
|
||||
SELECT dt, width, height, west, south, east, north, res_deg, data
|
||||
FROM radar_tiles
|
||||
WHERE z=$1 AND y=$2 AND x=$3 AND dt >= $4 AND dt < $5
|
||||
ORDER BY dt ASC`
|
||||
rows, err := db.QueryContext(ctx, q, z, y, x, from, to)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer rows.Close()
|
||||
var out []tileRec
|
||||
for rows.Next() {
|
||||
var r tileRec
|
||||
if err := rows.Scan(&r.DT, &r.Width, &r.Height, &r.West, &r.South, &r.East, &r.North, &r.ResDeg, &r.Data); err == nil {
|
||||
out = append(out, r)
|
||||
}
|
||||
}
|
||||
return out, nil
|
||||
}
|
||||
|
||||
func bucket10(t time.Time, loc *time.Location) time.Time {
|
||||
tt := t.In(loc)
|
||||
m := (tt.Minute() / 10) * 10
|
||||
return time.Date(tt.Year(), tt.Month(), tt.Day(), tt.Hour(), m, 0, 0, loc)
|
||||
}
|
||||
|
||||
func loadWindAt(db *sql.DB, stationID, alias string, dt time.Time) (speedMS float64, dirDeg float64, ok bool, err error) {
|
||||
const q = `
|
||||
SELECT wind_speed, wind_direction
|
||||
FROM radar_weather
|
||||
WHERE alias=$1 AND dt=$2
|
||||
LIMIT 1`
|
||||
tryAlias := func(a string) (float64, float64, bool, error) {
|
||||
var s, d sql.NullFloat64
|
||||
err := db.QueryRow(q, a, dt).Scan(&s, &d)
|
||||
if err == sql.ErrNoRows {
|
||||
return 0, 0, false, nil
|
||||
}
|
||||
if err != nil {
|
||||
return 0, 0, false, err
|
||||
}
|
||||
if !s.Valid || !d.Valid {
|
||||
return 0, 0, false, nil
|
||||
}
|
||||
return s.Float64, d.Float64, true, nil
|
||||
}
|
||||
if speed, dir, ok, err := tryAlias(stationID); err != nil {
|
||||
return 0, 0, false, err
|
||||
} else if ok {
|
||||
return speed, dir, true, nil
|
||||
}
|
||||
return tryAlias(alias)
|
||||
}
|
||||
|
||||
func decodeTile(t tileRec) (vals [][]*float64, xs []float64, ys []float64, err error) {
|
||||
w, h := t.Width, t.Height
|
||||
if w <= 0 || h <= 0 {
|
||||
return nil, nil, nil, fmt.Errorf("非法尺寸")
|
||||
}
|
||||
if len(t.Data) < w*h*2 {
|
||||
return nil, nil, nil, fmt.Errorf("数据长度不足")
|
||||
}
|
||||
xs = make([]float64, w)
|
||||
for c := 0; c < w; c++ {
|
||||
xs[c] = t.West + (float64(c)+0.5)*t.ResDeg
|
||||
}
|
||||
ys = make([]float64, h)
|
||||
for r := 0; r < h; r++ {
|
||||
ys[r] = t.South + (float64(r)+0.5)*t.ResDeg
|
||||
}
|
||||
vals = make([][]*float64, h)
|
||||
off := 0
|
||||
for r := 0; r < h; r++ {
|
||||
row := make([]*float64, w)
|
||||
for c := 0; c < w; c++ {
|
||||
v := int16(binary.BigEndian.Uint16(t.Data[off : off+2]))
|
||||
off += 2
|
||||
if v >= 32766 {
|
||||
row[c] = nil
|
||||
continue
|
||||
}
|
||||
dbz := float64(v) / 10.0
|
||||
if dbz < 0 {
|
||||
dbz = 0
|
||||
} else if dbz > 75 {
|
||||
dbz = 75
|
||||
}
|
||||
value := dbz
|
||||
row[c] = &value
|
||||
}
|
||||
vals[r] = row
|
||||
}
|
||||
return vals, xs, ys, nil
|
||||
}
|
||||
|
||||
func haversine(lat1, lon1, lat2, lon2 float64) float64 {
|
||||
const R = 6371000.0
|
||||
dLat := toRad(lat2 - lat1)
|
||||
dLon := toRad(lon2 - lon1)
|
||||
a := math.Sin(dLat/2)*math.Sin(dLat/2) + math.Cos(toRad(lat1))*math.Cos(toRad(lat2))*math.Sin(dLon/2)*math.Sin(dLon/2)
|
||||
c := 2 * math.Atan2(math.Sqrt(a), math.Sqrt(1-a))
|
||||
return R * c
|
||||
}
|
||||
|
||||
func bearingDeg(lat1, lon1, lat2, lon2 float64) float64 {
|
||||
φ1 := toRad(lat1)
|
||||
φ2 := toRad(lat2)
|
||||
Δλ := toRad(lon2 - lon1)
|
||||
y := math.Sin(Δλ) * math.Cos(φ2)
|
||||
x := math.Cos(φ1)*math.Sin(φ2) - math.Sin(φ1)*math.Cos(φ2)*math.Cos(Δλ)
|
||||
brg := toDeg(math.Atan2(y, x))
|
||||
if brg < 0 {
|
||||
brg += 360
|
||||
}
|
||||
return brg
|
||||
}
|
||||
|
||||
func angDiff(a, b float64) float64 {
|
||||
d := math.Mod(a-b+540, 360) - 180
|
||||
if d < 0 {
|
||||
d = -d
|
||||
}
|
||||
return math.Abs(d)
|
||||
}
|
||||
|
||||
func toRad(d float64) float64 { return d * math.Pi / 180 }
|
||||
func toDeg(r float64) float64 { return r * 180 / math.Pi }
|
||||
|
||||
func formatFloat(v float64, ok bool, digits int) string {
|
||||
if !ok || math.IsNaN(v) {
|
||||
return ""
|
||||
}
|
||||
format := fmt.Sprintf("%%.%df", digits)
|
||||
return fmt.Sprintf(format, v)
|
||||
}
|
||||
|
||||
func formatTime(t time.Time, ok bool) string {
|
||||
if !ok || t.IsZero() {
|
||||
return ""
|
||||
}
|
||||
return t.Format("2006-01-02 15:04:05")
|
||||
}
|
||||
227
cmd/rainfetch/main.go
Normal file
227
cmd/rainfetch/main.go
Normal file
@ -0,0 +1,227 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"context"
|
||||
"database/sql"
|
||||
"flag"
|
||||
"fmt"
|
||||
"io"
|
||||
"log"
|
||||
"net/http"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"strings"
|
||||
"time"
|
||||
|
||||
dbpkg "weatherstation/internal/database"
|
||||
"weatherstation/internal/rain"
|
||||
)
|
||||
|
||||
// 简单的小时雨量（CMPA）按时间范围下载器：
|
||||
// - 输入时间为北京时间（Asia/Shanghai）
|
||||
// - 构造下载路径使用 UTC（本地整点 -8h）
|
||||
// - 入库前通过 rain.StoreTileBytes 使用 URL 解析将 UTC 还原为北京时间并写库
|
||||
// 用法示例：
|
||||
//
|
||||
// go run ./cmd/rainfetch --from "2025-10-07 09:00:00" --to "2025-10-07 11:00:00" \
|
||||
// --tiles "7/40/102,7/40/104" --outdir rain_data
|
||||
func main() {
|
||||
var (
|
||||
fromStr = flag.String("from", "", "起始时间（北京时间，YYYY-MM-DD HH:MM:SS 或 YYYY-MM-DD）")
|
||||
toStr = flag.String("to", "", "结束时间（北京时间，YYYY-MM-DD HH:MM:SS 或 YYYY-MM-DD）")
|
||||
tiles = flag.String("tiles", "7/40/102,7/40/104", "瓦片列表，逗号分隔，每项为 z/y/x，如 7/40/102")
|
||||
outDir = flag.String("outdir", "rain_data", "保存目录（同时也会写入数据库）")
|
||||
baseURL = flag.String("base", "https://image.data.cma.cn/tiles/China/CMPA_RT_China_0P01_HOR-PRE_GISJPG_Tiles/%Y%m%d/%H/%M/{z}/{y}/{x}.bin", "下载基础URL模板（UTC路径时间）")
|
||||
dryRun = flag.Bool("dry", false, "仅打印将要下载的URL与目标，不实际下载写库")
|
||||
)
|
||||
flag.Parse()
|
||||
|
||||
if strings.TrimSpace(*fromStr) == "" || strings.TrimSpace(*toStr) == "" {
|
||||
log.Fatalln("必须提供 --from 与 --to（北京时间）")
|
||||
}
|
||||
|
||||
loc, _ := time.LoadLocation("Asia/Shanghai")
|
||||
if loc == nil {
|
||||
loc = time.FixedZone("CST", 8*3600)
|
||||
}
|
||||
|
||||
parseCST := func(s string) (time.Time, error) {
|
||||
s = strings.TrimSpace(s)
|
||||
var t time.Time
|
||||
var err error
|
||||
if len(s) == len("2006-01-02") {
|
||||
// 日期：按 00:00:00 处理
|
||||
if tm, e := time.ParseInLocation("2006-01-02", s, loc); e == nil {
|
||||
t = tm
|
||||
} else {
|
||||
err = e
|
||||
}
|
||||
} else {
|
||||
t, err = time.ParseInLocation("2006-01-02 15:04:05", s, loc)
|
||||
}
|
||||
return t, err
|
||||
}
|
||||
|
||||
start, err1 := parseCST(*fromStr)
|
||||
end, err2 := parseCST(*toStr)
|
||||
if err1 != nil || err2 != nil {
|
||||
log.Fatalf("解析时间失败: from=%v to=%v", err1, err2)
|
||||
}
|
||||
if end.Before(start) {
|
||||
log.Fatalln("结束时间需不小于起始时间")
|
||||
}
|
||||
|
||||
// 小时步进（包含端点）：先对齐到小时
|
||||
cur := start.Truncate(time.Hour)
|
||||
end = end.Truncate(time.Hour)
|
||||
|
||||
// 解析 tiles 参数
|
||||
type tcoord struct{ z, y, x int }
|
||||
var tlist []tcoord
|
||||
for _, part := range strings.Split(*tiles, ",") {
|
||||
p := strings.TrimSpace(part)
|
||||
if p == "" {
|
||||
continue
|
||||
}
|
||||
var z, y, x int
|
||||
if _, err := fmt.Sscanf(p, "%d/%d/%d", &z, &y, &x); err != nil {
|
||||
log.Fatalf("无效的 tiles 项: %s", p)
|
||||
}
|
||||
tlist = append(tlist, tcoord{z, y, x})
|
||||
}
|
||||
if len(tlist) == 0 {
|
||||
log.Fatalln("tiles 解析后为空")
|
||||
}
|
||||
|
||||
if err := os.MkdirAll(*outDir, 0o755); err != nil {
|
||||
log.Fatalf("创建输出目录失败: %v", err)
|
||||
}
|
||||
|
||||
ctx := context.Background()
|
||||
total := 0
|
||||
success := 0
|
||||
for !cur.After(end) {
|
||||
// 本地整点（CST）→ UTC 路径时间
|
||||
slotLocal := cur
|
||||
slotUTC := slotLocal.Add(-8 * time.Hour).In(time.UTC)
|
||||
dateStr := slotUTC.Format("20060102")
|
||||
hh := slotUTC.Format("15")
|
||||
mm := "00"
|
||||
log.Printf("[rainfetch] 时次 local=%s, utc=%s", slotLocal.Format("2006-01-02 15:04"), slotUTC.Format("2006-01-02 15:04"))
|
||||
|
||||
for _, tc := range tlist {
|
||||
total++
|
||||
// 构造 URL
|
||||
url := *baseURL
|
||||
url = strings.ReplaceAll(url, "%Y%m%d", dateStr)
|
||||
url = strings.ReplaceAll(url, "%H", hh)
|
||||
url = strings.ReplaceAll(url, "%M", mm)
|
||||
url = strings.ReplaceAll(url, "{z}", fmt.Sprintf("%d", tc.z))
|
||||
url = strings.ReplaceAll(url, "{y}", fmt.Sprintf("%d", tc.y))
|
||||
url = strings.ReplaceAll(url, "{x}", fmt.Sprintf("%d", tc.x))
|
||||
|
||||
fname := fmt.Sprintf("rain_z%d_y%d_x%d_%s.bin", tc.z, tc.y, tc.x, slotLocal.Format("20060102_1504"))
|
||||
dest := filepath.Join(*outDir, fname)
|
||||
|
||||
if *dryRun {
|
||||
log.Printf("[rainfetch] DRY url=%s -> %s", url, dest)
|
||||
continue
|
||||
}
|
||||
|
||||
// 若 DB 已有，则跳过
|
||||
if ref, e := rain.ParseCMPATileURL(url); e == nil {
|
||||
exists, e2 := databaseHas(ctx, ref.Product, ref.DT, tc.z, tc.y, tc.x)
|
||||
if e2 == nil && exists {
|
||||
log.Printf("[rainfetch] skip exists in DB z=%d y=%d x=%d dt=%s", tc.z, tc.y, tc.x, ref.DT.Format("2006-01-02 15:04"))
|
||||
continue
|
||||
}
|
||||
}
|
||||
|
||||
if err := httpDownloadTo(ctx, url, dest); err != nil {
|
||||
log.Printf("[rainfetch] 下载失败 z=%d y=%d x=%d: %v", tc.z, tc.y, tc.x, err)
|
||||
continue
|
||||
}
|
||||
log.Printf("[rainfetch] 保存 %s", dest)
|
||||
|
||||
// 写库（使用 URL 解析 UTC → CST 后 upsert）
|
||||
b, rerr := os.ReadFile(dest)
|
||||
if rerr != nil {
|
||||
log.Printf("[rainfetch] 读文件失败: %v", rerr)
|
||||
continue
|
||||
}
|
||||
if err := rain.StoreTileBytes(ctx, url, b); err != nil {
|
||||
log.Printf("[rainfetch] 入库失败: %v", err)
|
||||
continue
|
||||
}
|
||||
success++
|
||||
}
|
||||
cur = cur.Add(1 * time.Hour)
|
||||
}
|
||||
log.Printf("[rainfetch] 完成：尝试 %d，成功 %d", total, success)
|
||||
}
|
||||
|
||||
// 轻量 DB 存在性检查（避免引入内部 database 包到该命令）：
|
||||
// 为了避免循环依赖，这里复制一份最小 SQL 调用；实际工程也可抽取共享函数。
|
||||
// 但当前 repo 中 database.GetDB 在 internal/database 包内，雨量 API 直接使用它。
|
||||
|
||||
// 注意：为保持最小侵入，这里通过 rain.StoreTileBytes 完成入库；
|
||||
// 仅在下载前进行“是否已存在”查询，避免重复下载。为此需要访问 internal/database。
|
||||
|
||||
func databaseHas(ctx context.Context, product string, dt time.Time, z, y, x int) (bool, error) {
|
||||
const q = `SELECT 1 FROM rain_tiles WHERE product=$1 AND dt=$2 AND z=$3 AND y=$4 AND x=$5 LIMIT 1`
|
||||
var one int
|
||||
err := dbpkg.GetDB().QueryRowContext(ctx, q, product, dt, z, y, x).Scan(&one)
|
||||
if err == sql.ErrNoRows {
|
||||
return false, nil
|
||||
}
|
||||
if err != nil {
|
||||
return false, err
|
||||
}
|
||||
return true, nil
|
||||
}
|
||||
|
||||
func httpDownloadTo(ctx context.Context, url, dest string) error {
|
||||
client := &http.Client{Timeout: 20 * time.Second}
|
||||
req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
|
||||
if err != nil {
|
||||
return fmt.Errorf("build request: %w", err)
|
||||
}
|
||||
req.Header.Set("Referer", "https://data.cma.cn/")
|
||||
req.Header.Set("Origin", "https://data.cma.cn")
|
||||
req.Header.Set("User-Agent", "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36")
|
||||
resp, err := client.Do(req)
|
||||
if err != nil {
|
||||
return fmt.Errorf("http get: %w", err)
|
||||
}
|
||||
defer resp.Body.Close()
|
||||
if resp.StatusCode != http.StatusOK {
|
||||
return fmt.Errorf("unexpected status: %d", resp.StatusCode)
|
||||
}
|
||||
tmp := dest + ".part"
|
||||
f, err := os.Create(tmp)
|
||||
if err != nil {
|
||||
return fmt.Errorf("create temp: %w", err)
|
||||
}
|
||||
_, copyErr := io.Copy(f, resp.Body)
|
||||
closeErr := f.Close()
|
||||
if copyErr != nil {
|
||||
_ = os.Remove(tmp)
|
||||
return fmt.Errorf("write body: %w", copyErr)
|
||||
}
|
||||
if closeErr != nil {
|
||||
_ = os.Remove(tmp)
|
||||
return fmt.Errorf("close temp: %w", closeErr)
|
||||
}
|
||||
if err := os.Rename(tmp, dest); err != nil {
|
||||
// Cross-device fallback
|
||||
data, rerr := os.ReadFile(tmp)
|
||||
if rerr != nil {
|
||||
return fmt.Errorf("read temp: %w", rerr)
|
||||
}
|
||||
if werr := os.WriteFile(dest, data, 0o644); werr != nil {
|
||||
return fmt.Errorf("write final: %w", werr)
|
||||
}
|
||||
_ = os.Remove(tmp)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
28
cmd/service-rain/main.go
Normal file
28
cmd/service-rain/main.go
Normal file
@ -0,0 +1,28 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"context"
|
||||
"log"
|
||||
"os"
|
||||
"os/signal"
|
||||
"syscall"
|
||||
"weatherstation/internal/rain"
|
||||
"weatherstation/internal/server"
|
||||
)
|
||||
|
||||
// service-rain: standalone CMPA hourly rain tile downloader
|
||||
// - Uses internal/rain scheduler with defaults
|
||||
// - Controlled by env vars in internal/rain (e.g., RAIN_ENABLED, RAIN_DIR, RAIN_BASE_URL)
|
||||
func main() {
|
||||
server.SetupLogger()
|
||||
|
||||
ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
|
||||
defer stop()
|
||||
|
||||
if err := rain.Start(ctx, rain.Options{StoreToDB: true}); err != nil {
|
||||
log.Fatalf("service-rain start error: %v", err)
|
||||
}
|
||||
|
||||
<-ctx.Done()
|
||||
log.Println("service-rain shutting down")
|
||||
}
|
||||
235
core/cmd/im_export_data/main.go
Normal file
235
core/cmd/im_export_data/main.go
Normal file
@ -0,0 +1,235 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"context"
|
||||
"database/sql"
|
||||
"encoding/csv"
|
||||
"flag"
|
||||
"fmt"
|
||||
"log"
|
||||
"os"
|
||||
"strings"
|
||||
"time"
|
||||
|
||||
"weatherstation/core/internal/data"
|
||||
)
|
||||
|
||||
type actualHour struct {
|
||||
HourEnd time.Time
|
||||
TempC float64
|
||||
HumidityPct float64
|
||||
PressureHpa float64
|
||||
WindSpeedMs float64
|
||||
WindDirDeg float64
|
||||
RainActualMM float64
|
||||
}
|
||||
|
||||
func main() {
|
||||
var stationID, startStr, endStr, providersCSV, outPath, tzName string
|
||||
flag.StringVar(&stationID, "station", "", "站点ID，如 RS485-002A6E")
|
||||
flag.StringVar(&startStr, "start", "", "开始时间，格式 2006-01-02 15:00")
|
||||
flag.StringVar(&endStr, "end", "", "结束时间，格式 2006-01-02 15:00（开区间）")
|
||||
flag.StringVar(&providersCSV, "providers", "caiyun,ec,wrf", "逗号分隔的预报源，默认 caiyun,ec,wrf")
|
||||
flag.StringVar(&outPath, "out", "", "输出 CSV 文件路径；留空输出到 stdout")
|
||||
flag.StringVar(&tzName, "tz", "Asia/Shanghai", "时区，例如 Asia/Shanghai")
|
||||
flag.Parse()
|
||||
|
||||
if strings.TrimSpace(stationID) == "" || strings.TrimSpace(startStr) == "" || strings.TrimSpace(endStr) == "" {
|
||||
log.Fatalf("用法: im_export_data --station RS485-XXXXXX --start '2024-08-01 00:00' --end '2024-08-02 00:00' [--providers caiyun,ec,wrf] [--out out.csv]")
|
||||
}
|
||||
|
||||
loc, _ := time.LoadLocation(tzName)
|
||||
if loc == nil {
|
||||
loc = time.FixedZone("CST", 8*3600)
|
||||
}
|
||||
parse := func(s string) time.Time {
|
||||
var t time.Time
|
||||
var err error
|
||||
for _, ly := range []string{"2006-01-02 15:04", "2006-01-02 15", "2006-01-02"} {
|
||||
t, err = time.ParseInLocation(ly, s, loc)
|
||||
if err == nil {
|
||||
return t.Truncate(time.Hour)
|
||||
}
|
||||
}
|
||||
log.Fatalf("无法解析时间: %s", s)
|
||||
return time.Time{}
|
||||
}
|
||||
start := parse(startStr)
|
||||
end := parse(endStr)
|
||||
if !end.After(start) {
|
||||
log.Fatalf("end 必须大于 start")
|
||||
}
|
||||
|
||||
providers := splitCSV(providersCSV)
|
||||
if len(providers) == 0 {
|
||||
providers = []string{"caiyun"}
|
||||
}
|
||||
|
||||
// Prepare writer
|
||||
var out *csv.Writer
|
||||
var file *os.File
|
||||
if strings.TrimSpace(outPath) != "" {
|
||||
f, err := os.Create(outPath)
|
||||
if err != nil {
|
||||
log.Fatalf("打开输出文件失败: %v", err)
|
||||
}
|
||||
defer f.Close()
|
||||
out = csv.NewWriter(f)
|
||||
file = f
|
||||
} else {
|
||||
out = csv.NewWriter(os.Stdout)
|
||||
}
|
||||
defer out.Flush()
|
||||
|
||||
// Header
|
||||
header := []string{"station_id", "hour_end", "temp_c", "humidity_pct", "wind_dir_deg", "wind_speed_ms", "pressure_hpa", "rain_actual_mm"}
|
||||
for _, p := range providers {
|
||||
header = append(header, fmt.Sprintf("%s_lead1_rain_mm", p))
|
||||
header = append(header, fmt.Sprintf("%s_lead2_rain_mm", p))
|
||||
header = append(header, fmt.Sprintf("%s_lead3_rain_mm", p))
|
||||
}
|
||||
if err := out.Write(header); err != nil {
|
||||
log.Fatalf("写入 CSV 失败: %v", err)
|
||||
}
|
||||
|
||||
ctx := context.Background()
|
||||
rows, err := loadActualHourly(ctx, stationID, start, end)
|
||||
if err != nil {
|
||||
log.Fatalf("查询实况失败: %v", err)
|
||||
}
|
||||
|
||||
for _, row := range rows {
|
||||
rec := []string{
|
||||
stationID,
|
||||
row.HourEnd.Format("2006-01-02 15:04:05"),
|
||||
fmt.Sprintf("%.2f", row.TempC),
|
||||
fmt.Sprintf("%.2f", row.HumidityPct),
|
||||
fmt.Sprintf("%.2f", row.WindDirDeg),
|
||||
fmt.Sprintf("%.3f", row.WindSpeedMs),
|
||||
fmt.Sprintf("%.2f", row.PressureHpa),
|
||||
fmt.Sprintf("%.3f", row.RainActualMM),
|
||||
}
|
||||
for _, p := range providers {
|
||||
// For each lead 1..3, get rain for forecast_time = hour_end, latest issued_at for that lead
|
||||
for lead := 1; lead <= 3; lead++ {
|
||||
v, _ := loadProviderRainAt(ctx, stationID, p, row.HourEnd, lead)
|
||||
if v < 0 {
|
||||
rec = append(rec, "")
|
||||
} else {
|
||||
rec = append(rec, fmt.Sprintf("%.3f", v))
|
||||
}
|
||||
}
|
||||
}
|
||||
if err := out.Write(rec); err != nil {
|
||||
log.Fatalf("写入 CSV 失败: %v", err)
|
||||
}
|
||||
}
|
||||
out.Flush()
|
||||
if err := out.Error(); err != nil {
|
||||
log.Fatalf("写入 CSV 错误: %v", err)
|
||||
}
|
||||
if file != nil {
|
||||
log.Printf("导出完成: %s，共 %d 行", outPath, len(rows))
|
||||
}
|
||||
}
|
||||
|
||||
func splitCSV(s string) []string {
|
||||
parts := strings.Split(s, ",")
|
||||
out := make([]string, 0, len(parts))
|
||||
for _, p := range parts {
|
||||
p = strings.TrimSpace(p)
|
||||
if p != "" {
|
||||
out = append(out, p)
|
||||
}
|
||||
}
|
||||
return out
|
||||
}
|
||||
|
||||
func loadActualHourly(ctx context.Context, stationID string, start, end time.Time) ([]actualHour, error) {
|
||||
// Right-endpoint hourly aggregation from rs485_weather_10min
|
||||
const q = `
|
||||
WITH base AS (
|
||||
SELECT * FROM rs485_weather_10min
|
||||
WHERE station_id = $1 AND bucket_start >= $2 AND bucket_start < $3
|
||||
), g AS (
|
||||
SELECT date_trunc('hour', bucket_start) AS grp,
|
||||
SUM(temp_c_x100 * sample_count)::bigint AS w_temp,
|
||||
SUM(humidity_pct * sample_count)::bigint AS w_hum,
|
||||
SUM(pressure_hpa_x100 * sample_count)::bigint AS w_p,
|
||||
SUM(solar_wm2_x100 * sample_count)::bigint AS w_solar,
|
||||
SUM(uv_index * sample_count)::bigint AS w_uv,
|
||||
SUM(wind_speed_ms_x1000 * sample_count)::bigint AS w_ws,
|
||||
MAX(wind_gust_ms_x1000) AS gust_max,
|
||||
SUM(sin(radians(wind_dir_deg)) * sample_count)::double precision AS sin_sum,
|
||||
SUM(cos(radians(wind_dir_deg)) * sample_count)::double precision AS cos_sum,
|
||||
SUM(rain_10m_mm_x1000) AS rain_sum,
|
||||
SUM(sample_count) AS n_sum
|
||||
FROM base GROUP BY 1
|
||||
)
|
||||
SELECT grp + interval '1 hour' AS hour_end,
|
||||
(w_temp/NULLIF(n_sum,0))/100.0 AS temp_c,
|
||||
(w_hum/NULLIF(n_sum,0))::double precision AS humidity_pct,
|
||||
(w_p/NULLIF(n_sum,0))/100.0 AS pressure_hpa,
|
||||
(w_ws/NULLIF(n_sum,0))/1000.0 AS wind_speed_ms,
|
||||
CASE WHEN sin_sum IS NULL OR cos_sum IS NULL THEN NULL
|
||||
ELSE (
|
||||
CASE WHEN degrees(atan2(sin_sum, cos_sum)) < 0
|
||||
THEN degrees(atan2(sin_sum, cos_sum)) + 360
|
||||
ELSE degrees(atan2(sin_sum, cos_sum)) END)
|
||||
END AS wind_dir_deg,
|
||||
(rain_sum/1000.0) AS rain_mm
|
||||
FROM g
|
||||
ORDER BY hour_end`
|
||||
|
||||
rows, err := data.DB().QueryContext(ctx, q, stationID, start, end)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer rows.Close()
|
||||
var out []actualHour
|
||||
for rows.Next() {
|
||||
var t time.Time
|
||||
var ta, ua, pa, ws, dm, rain sql.NullFloat64
|
||||
if err := rows.Scan(&t, &ta, &ua, &pa, &ws, &dm, &rain); err != nil {
|
||||
continue
|
||||
}
|
||||
out = append(out, actualHour{
|
||||
HourEnd: t,
|
||||
TempC: nullF(ta),
|
||||
HumidityPct: nullF(ua),
|
||||
PressureHpa: nullF(pa),
|
||||
WindSpeedMs: nullF(ws),
|
||||
WindDirDeg: nullF(dm),
|
||||
RainActualMM: nullF(rain),
|
||||
})
|
||||
}
|
||||
return out, nil
|
||||
}
|
||||
|
||||
// loadProviderRainAt returns rain(mm) for a provider at forecast_time=t with fixed lead, picking latest issued_at.
|
||||
func loadProviderRainAt(ctx context.Context, stationID, provider string, t time.Time, lead int) (float64, error) {
|
||||
const q = `
|
||||
SELECT COALESCE(rain_mm_x1000,0)::bigint
|
||||
FROM (
|
||||
SELECT rain_mm_x1000, issued_at,
|
||||
CEIL(EXTRACT(EPOCH FROM ($3 - issued_at)) / 3600.0)::int AS lead_hours
|
||||
FROM forecast_hourly
|
||||
WHERE station_id=$1 AND provider=$2 AND forecast_time=$3
|
||||
) x
|
||||
WHERE lead_hours=$4
|
||||
ORDER BY issued_at DESC
|
||||
LIMIT 1`
|
||||
var v int64
|
||||
err := data.DB().QueryRowContext(ctx, q, stationID, provider, t, lead).Scan(&v)
|
||||
if err != nil {
|
||||
return -1, err
|
||||
}
|
||||
return float64(v) / 1000.0, nil
|
||||
}
|
||||
|
||||
func nullF(n sql.NullFloat64) float64 {
|
||||
if n.Valid {
|
||||
return n.Float64
|
||||
}
|
||||
return 0
|
||||
}
|
||||
Loading…
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Reference in New Issue
Block a user