LatLong Converter

CGCS2000 to BD-09 Converter

CGCS2000
BD-09
CGCS2000
BD-09

About CGCS2000 Coordinate System

1Definition

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.

2Development History

CGCS2000 was officially adopted by the State Council of China in 2008 as the national standard.

3Applications

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.

ITRF Alignment

CGCS2000 is aligned with the International Terrestrial Reference Frame 1997 (ITRF97) at epoch 2000.0.

WGS84 Compatibility

CGCS2000 and WGS84 are essentially identical for most practical applications, with differences typically less than 1 meter.

Modern Infrastructure

CGCS2000 is supported by a nationwide network of continuously operating reference stations (CORS) across China.

About BD-09 Coordinate System

1Definition

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.

2Development History

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.

3Applications

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.

Double Encryption

BD-09 adds a second encryption layer on top of GCJ-02, making it the most heavily obfuscated coordinate system used in China.

Baidu Ecosystem

Used exclusively within Baidu's mapping platform. If you're developing with Baidu Maps API, all coordinates must be in BD-09 format.

Third-party Conversion

Conversion between BD-09 and other systems relies on reverse-engineered algorithms that provide sub-meter accuracy.

CGCS2000 to BD-09 Conversion Guide

📐 Conversion Formula
// 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

CGCS2000 to BD-09 is performed via a two-step transformation through WGS84 as an intermediate reference system, ensuring maximum accuracy.

📋 Operation Steps
  1. Enter your CGCS2000 coordinates in the input field (latitude, longitude, one pair per line)
  2. Click the Convert button to transform coordinates from CGCS2000 to BD-09
  3. Review the converted BD-09 coordinates in the output field
  4. Copy the results or save them as an XLSX file for further use
💡 Tips
  • 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

Frequently Asked Questions

The accuracy depends on the specific coordinate systems being converted. For standard geographic transformations between CGCS2000 and BD-09, typical accuracy is within sub-meter range under normal conditions. For systems requiring 7-parameter transformations, accuracy depends heavily on the quality and regional relevance of the parameters used. Always verify results for critical applications.

Yes! Our tool supports batch conversion. Simply enter multiple coordinate pairs, one per line, in the input field on this page. All coordinates will be processed simultaneously, and you can download the results as an XLSX file for further analysis or integration.

Enter coordinates in the format: latitude, longitude (one pair per line). Latitude should be the first value, longitude the second. For example: 23.05105,113.37149. Ensure latitude is between -90 and 90, and longitude is between -180 and 180.

For this conversion, standard parameters may be sufficient for most applications.

Absolutely. All coordinate conversions are performed entirely in your browser using client-side JavaScript. Your data is never sent to any server, ensuring complete privacy and security of your geographic information. This is especially important for sensitive location data.

CGCS2000 cgcs2000 (china geodetic coordinate system 2000) is china's official national geodetic coordinate sy... BD-09 bd-09 (baidu coordinate system) is a geodetic system developed by baidu, based on gcj-02 with additi. The conversion between them accounts for differences in their ellipsoid parameters, datum origins, and any encryption offsets.