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The geographic coordinate converter supports accurate conversion between WGS84, GCJ02, and BD09 coordinate systems to fix map location offsets.
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When there is a discrepancy between the coordinates obtained from your GPS device and the location displayed on a map, the geographic coordinate converter solves this issue using coordinate system conversion algorithms. This tool specializes in converting geographic coordinate systems, transforming input latitude and longitude coordinates (e.g., 116.397499,39.908744) from the original coordinate system to the target coordinate system. It natively supports mutual conversion between the three major coordinate systems: WGS84 (the international standard GPS coordinate system), GCJ02 (the official encrypted coordinate system in China), and BD09 (the Baidu Maps coordinate system), ensuring the consistency of location data across different platforms.
What is the margin of error for coordinate conversion accuracy?
The conversion error is typically within 1 to 3 meters, which is considered a millimeter-level accuracy offset.
Why must maps in mainland China use the GCJ02 coordinate system?
According to national surveying and mapping regulations, public map services must use the GCJ02 coordinate system to apply non-linear offset encryption to real coordinates. This tool achieves coordinate adaptation through reverse algorithms.
Please enter coordinates strictly in the longitude,latitude order; be sure to confirm the coordinate system type before converting; sensitive coordinate data will not be stored; batch processing requires operating on single coordinates sequentially; if the result is abnormal, please check your network connection.
It is recommended to prioritize using WGS84 decimal coordinates (e.g., 39.908744°) to ensure conversion accuracy. Typical scenario example: After converting the coordinates of the Forbidden City collected by a GPS device (WGS84: 116.397499,39.908744) to the GCJ02 coordinate system, the positioning deviation on Amap can be corrected to within 3 meters.
