DataV map widgets use the GCJ-02 coordinate system and the GeoJSON geographic data format. You can use a coordinate picker to quickly obtain GCJ-02 coordinates for your maps.
GCJ-02 coordinate system
DataV map widgets primarily use the GCJ-02 coordinate system. GCJ-02 is a coordinate system for geographic information systems (GIS) developed by the China State Bureau of Surveying and Mapping (Guojia Cehui Ju). It is an encryption algorithm that applies a random bias to latitude and longitude data. All map systems published in mainland China, including online maps, must use GCJ-02 to encrypt geographic locations.
GeoJSON format
DataV map widgets primarily use the GeoJSON geographic data format.
- GeoJSON is a data exchange format for geospatial information based on JavaScript Object Notation (JSON). For more information, see Geospatial Data Format GeoJSON.
- Use the online GeoJSON editor DataV.GeoAtlas to obtain or edit geographic data in GeoJSON format.
- Use the DataV.GeoAtlas widget to fetch administrative border data in GeoJSON format. The lowest available administrative level is the district or county level.
Coordinate picker—AMAP
Use the AMAP coordinate picker to convert a detailed address into precise coordinates based on the GCJ-02 coordinate system.
For example, enter Xixi Wetland in the search box. The corresponding coordinates appear in the Coordinate Results on the right.