How to Convert GCJ-02 to CGCS2000 (EPSG:4490)
CGCS2000 (China Geodetic Coordinate System 2000) is commonly referenced as EPSG:4490. GCJ-02 is the encrypted system used by Amap and related services. Convert between them when your data must match a CGCS2000 pipeline.
Open the converter with GCJ-02 → EPSG:4490 already selected.
Open converter: GCJ-02 → CGCS2000Steps
- Open the Coordinate Converter (use the button below to preselect CRS).
- Confirm source is GCJ-02 and target is EPSG:4490 (CGCS2000).
- Paste coordinates (one per line, lon,lat) or import a CSV/TXT file.
- Click convert, then copy or export to CSV/GeoJSON.
Tip: GCJ-02 applies a national offset on top of WGS84-like coordinates. CGCS2000 (EPSG:4490) is a geodetic CRS used in many China GIS datasets. Always label the datum in your metadata and verify critical points.
About this conversion
This guide describes a practical browser workflow. For surveying or legal boundary work, validate results with your organization’s approved CRS procedures.