CGCS2000 to BD-09 Converter
About CGCS2000 Coordinate System
CGCS2000 (China Geodetic Coordinate System 2000) is China's official national geodetic coordinate system, replacing Beijing 1954 and Xian 1980 systems. It is aligned with ITRF97.
CGCS2000 was officially adopted by the State Council of China in 2008 as the national standard.
CGCS2000 is mandatory for all official surveying, mapping, and GIS projects in China. It is used by government agencies, land management, urban planning, and infrastructure development.
CGCS2000 is aligned with the International Terrestrial Reference Frame 1997 (ITRF97) at epoch 2000.0.
CGCS2000 and WGS84 are essentially identical for most practical applications, with differences typically less than 1 meter.
CGCS2000 is supported by a nationwide network of continuously operating reference stations (CORS) across China.
About BD-09 Coordinate System
BD-09 (Baidu Coordinate System) is a geodetic system developed by Baidu, based on GCJ-02 with additional encryption for use in Baidu Maps and related services.
Baidu developed BD-09 by applying a secondary encryption layer on top of GCJ-02 to further obfuscate coordinates. It is proprietary to Baidu and used exclusively in their mapping ecosystem.
BD-09 is used exclusively in Baidu Maps, Baidu Navigation, and Baidu LBS API. It is the most encrypted coordinate system among Chinese map services.
BD-09 adds a second encryption layer on top of GCJ-02, making it the most heavily obfuscated coordinate system used in China.
Used exclusively within Baidu's mapping platform. If you're developing with Baidu Maps API, all coordinates must be in BD-09 format.
Conversion between BD-09 and other systems relies on reverse-engineered algorithms that provide sub-meter accuracy.
CGCS2000 → BD-09 Conversion Guide
// CGCS2000 → BD-09 (via WGS84 intermediate)
// Most non-WGS84 conversions use a two-step process:
// Step 1: CGCS2000 → WGS84 (using reverse transformation)
// Step 2: WGS84 → BD-09 (using forward transformation)
// This ensures maximum accuracy by routing through
// the well-defined global WGS84 reference system
// rather than attempting a direct transformation{{from}} to {{to}} is performed via a two-step transformation through WGS84 as an intermediate reference system, ensuring maximum accuracy.
- Enter your CGCS2000 coordinates in the input field (latitude, longitude, one pair per line)
- Click the Convert button to transform coordinates from CGCS2000 to BD-09
- Review the converted BD-09 coordinates in the output field
- Copy the results or save them as an XLSX file for further use
- Ensure coordinates are within valid ranges before conversion
- For batch conversions, enter one coordinate pair per line
- Verify a sample of converted coordinates on your target platform
- All conversions are performed client-side for complete data privacy