- autonavi.GetCoordinateDistrictCode will return fake district code when the city has no district.

platformapi/autonavi/autonavi.go

@@ -41,6 +41,10 @@ const (
 	CoordSysBaidu    = "baidu"
 )
 
+const (
+	FakeDistrictPadding = 9000000
+)
+
 var (
 	exceedLimitCodes = map[string]int{
 		InfoCode_ACCESS_TOO_FREQUENT:           1,
@@ -164,6 +168,7 @@ func (a *API) CoordinateConvert(lng, lat float64, coordsys string) (retLng, retL
 	return lng, lat, err
 }
 
+// 有些市是没有区的，比如东莞，这种情况下返回的区码是一个假的区域，即市的编码加上9000000
 func (a *API) GetCoordinateDistrictCode(lng, lat float64) (districtCode int) {
 	params := map[string]interface{}{
 		"location": fmt.Sprintf("%.6f,%.6f", lng, lat),
@@ -174,6 +179,9 @@ func (a *API) GetCoordinateDistrictCode(lng, lat float64) (districtCode int) {
 		addressComponent := result["regeocode"].(map[string]interface{})["addressComponent"].(map[string]interface{})
 		if strAdcode, ok := addressComponent["adcode"].(string); ok {
 			districtCode = int(utils.Str2Int64WithDefault(strAdcode, 0))
+			if _, ok := addressComponent["district"].(string); !ok {
+				districtCode += FakeDistrictPadding
+			}
 		}
 	}
 	return districtCode

platformapi/autonavi/autonavi_test.go

@@ -37,13 +37,24 @@ func TestCoordinateConvert(t *testing.T) {
 }
 
 func TestGetCoordinateCodes(t *testing.T) {
-	// districtCode := autonaviAPI.GetCoordinateDistrictCode(119.40695, 32.38755)
-	districtCode := autonaviAPI.GetCoordinateDistrictCode(104.053567, 30.576072)
+	dongguanLng := 113.703870
+	dongguanLat := 22.833210
+	districtCode := autonaviAPI.GetCoordinateDistrictCode(dongguanLng, dongguanLat)
+	if districtCode != 9441900 {
+		t.Fatalf("TestGetCoordinateCodes failed")
+	} else {
+		t.Log(districtCode)
+	}
+
+	cdgxWuhouLng := 104.052971
+	cdgxWuhouLat := 30.576076
+	districtCode = autonaviAPI.GetCoordinateDistrictCode(cdgxWuhouLng, cdgxWuhouLat)
 	if districtCode != 510107 {
 		t.Fatalf("TestGetCoordinateCodes failed")
 	} else {
 		t.Log(districtCode)
 	}
+
 	districtCode = autonaviAPI.GetCoordinateDistrictCode(0, 0)
 	if districtCode != 0 {
 		t.Fatalf("TestGetCoordinateCodes failed")