国家基础地理信息中心 (National Geomatics Center of China)
Use NGCC webmap.cn for authoritative Chinese national DEM and baseline geographic data; a Chinese mobile number is required for registration.
Format
GeoTIFF
Geometry
Raster DEM
Coverage
China (national territory)
Resolution
25 m (1:50K) / 100 m (1:250K) / 1 km (1:1M)
About this dataset
国家基础地理信息中心 (NGCC) provides authoritative Chinese national baseline geographic data including DEM, administrative boundaries, and topographic maps via webmap.cn.
国家基础地理信息中心 (National Geomatics Center of China, NGCC) offers authoritative national-scale geographic datasets including 1:1M, 1:250K, and 1:50K DEM products for China. Data is distributed through the webmap.cn portal and requires registration with a Chinese mobile number. NGCC data is the official reference for Chinese cartography and national terrain mapping.
How to download
- 1 Register an account at webmap.cn using a Chinese mobile number (中国手机号) for SMS verification.
- 2 Log in and browse the data catalog (数据目录) to select the desired DEM scale (1:1M, 1:250K, or 1:50K).
- 3 Select your area of interest within China and add the product to your download queue.
- 4 Download the GeoTIFF DEM data and process in QGIS or GDAL for your China-focused terrain project.
FAQ
What coordinate system does NGCC data use?
NGCC datasets typically use the China Geodetic Coordinate System 2000 (CGCS2000, EPSG:4490), which is similar to but not identical with WGS 84. Transform to EPSG:4326 if needed for global interoperability.
Can I download NGCC data without a Chinese phone number?
No. Registration requires a Chinese mobile number (中国手机号) for SMS verification. There is currently no alternative for international users.