暂时使用星下点坐标作为图像左上角坐标

pkg/producer/util.go

@@ -1,29 +1,47 @@
 package imageproc
 
 import (
+	"os"
 	"time"
 
 	"github.com/airbusgeo/godal"
 	log "github.com/sirupsen/logrus"
+	"starwiz.cn/sjy01/image-proc/pkg/calculator"
 )
 
-func setGeoTransform(ds *godal.Dataset, topLeftX, topLeftY, width, height, resolution float64) {
+func setGeoTransform(ds *godal.Dataset, topLeftLng, topLeftLat, resolution float64) {
+	// 转换分辨率（米到度）
+	resLat := resolution / calculator.MetersPerDegreeLatitude
+	resLng := calculator.MetersToDegreesLongitude(resolution, topLeftLat)
 	// 设置地理变换（假设左上角坐标为(0,0)，PAN每个像素分辨率为1.2米）
 	geotransform := [6]float64{
-		0,           // top left x
-		resolution,  // w-e pixel resolution
-		0,           // rotation, 0 if image is "north up"
-		0,           // top left y
-		0,           // rotation, 0 if image is "north up"
-		-resolution, // n-s pixel resolution (negative value)
+		topLeftLng, // top left x
+		resLng,     // w-e pixel resolution
+		0,          // rotation, 0 if image is "north up"
+		topLeftLat, // top left y
+		0,          // rotation, 0 if image is "north up"
+		-resLat,    // n-s pixel resolution (negative value)
 	}
 	err := ds.SetGeoTransform(geotransform)
 	if err != nil {
 		log.Errorf("Failed to set GeoTransform: %v", err)
+		return
 	}
 
-	// 设置投影信息（WGS84）
-	err = ds.SetProjection(calculateProj(topLeftX, topLeftY, width, height, resolution))
+	// 设置投影为 WGS84
+	srs, err := godal.NewSpatialRefFromEPSG(4326) //  gdal.CreateSpatialReference("")
+	if err != nil {
+		log.Errorf("Failed to set spatial reference: %v", err)
+		return
+	}
+
+	projWKT, err := srs.WKT()
+	if err != nil {
+		log.Errorf("Failed to convert spatial reference to WKT: %v", err)
+		return
+	}
+
+	err = ds.SetProjection(projWKT)
 	if err != nil {
 		log.Errorf("Failed to set projection: %v", err)
 	}
@@ -32,3 +50,12 @@ func setGeoTransform(ds *godal.Dataset, topLeftX, topLeftY, width, height, resol
 	ds.SetMetadata("TIFFTAG_DATETIME", time.Now().String())
 	ds.SetMetadata("TIFFTAG_SOFTWARE", "StarWiz-SJY01-IMAGE-PROC")
 }
+
+func sizeOfFile(file string) int64 {
+	fileInfo, err := os.Stat(file)
+	if err != nil {
+		log.Errorf("Failed to get file size: %v", err)
+		return 0
+	}
+	return fileInfo.Size()
+}