This topic describes the GCJ-02 coordinate system and the GeoJSON data format used by DataV map widgets. You can obtain the GCJ-02 coordinate of a location on the map.
GCJ-02 coordinate system
DataV map widgets use the GCJ-02 coordinate system. It is developed by the Chinese National Bureau of Surveying and Mapping. GCJ-02 uses an encryption algorithm to encrypt the latitude and longitude of a location by adding random offsets to the latitude and longitude. All maps published in mainland China, including electronic maps, must use GCJ-02 for initial encryption of geographical location data.
GeoJSON data format
DataV map widgets use geographic data in the GeoJSON format.
- GeoJSON is used to present geospatial information based on JavaScript Object Notation (JSON).
- You can use the online GeoJSON editor geojson.io to view or edit geospatial data.
Coordinate picker in Google Maps
Use a coordinate picker in Google Maps to convert a location to a precise GCJ-02 coordinate.
