中国地図の座標変換
インターネット上で無料で座標系を変換可能。WGS-84/GCJ-02/BD-09への変換が可能。
について China Coordinate System Transform
Convert between WGS-84, GCJ-02, と BD-09 coordinate systems used in China mapping platforms. Essential for developers working with Chinese map services.
Coordinate Systems Explained
WGS-84 is the GPS stとard used globally. GCJ-02 (Mars coordinates) is used by Gaode (Amap) と Tencent Maps. BD-09 is used by Baidu Maps. Each system offsets coordinates differently.
How to 使用
Enter latitude と longitude values, select the source と target coordinate systems, then click Convert. The result will show the coordinates in the target system with 8 decimal places.
▶Why do I need coordinate transformation？
Chinese map services use different coordinate systems. GPS returns WGS-84, but Gaode/Amap uses GCJ-02 と Baidu uses BD-09. You must convert between them for accurate map positioning.
▶...は...と同じですか the conversion accurate？
The conversion uses stとard algorithms with sub-meter precision. However, the GCJ-02 algorithm is an approximation of the official (undisclosed) transformation.
▶Can I convert in reverse？
Yes. You can convert from any system to any other system. Select the source と target systems using the dropdown menus.
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