- 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