WGS84 to BD09

Convert WGS84 coordinate system to BD09 coordinate system (Baidu Coordinate System)

Direct Adaptation

Convert GPS coordinates to Baidu Maps compatible coordinates

Two-Step Conversion

Via GCJ02 intermediate step for stable results

Baidu Optimized

Suitable for Baidu Maps integration scenarios

Coordinate Conversion

Convert coordinates from WGS84 system to BD09 system

Longitude

Latitude

About

WGS84 to BD09 typically requires converting to GCJ02 first, then to BD09.
Suitable for directly displaying GPS data on Baidu Maps.
Commonly used in positioning, trajectory tracking and map annotation scenarios.
The conversion process maintains good precision and stability.

How to Use

1
Paste WGS84 coordinates from your GPS device, drone, or fitness watch — one point per line, batch input welcome.
2
Click Convert and the tool chains both steps automatically: WGS84 to GCJ02 first, then GCJ02 to BD09, matching Baidu's own conversion pipeline.
3
Copy the BD09 coordinates or export the batch for the Baidu Maps API. The whole chain runs in your browser — free and completely private.

FAQ

QCan WGS84 be converted directly to BD09 in one step?

ABD09 is defined as an offset on top of GCJ02, not on WGS84, so every correct pipeline passes through GCJ02. This tool performs both stages internally and hands you the final BD09 values directly.

QWhy is my GPS track drawn in the wrong place on Baidu Maps?

ABaidu Maps renders in BD09, while your GPS records in WGS84, so unconverted tracks land several hundred meters off. Converting through this tool aligns them precisely with Baidu's basemap.

QWhat happens to coordinates outside mainland China?

AThe GCJ02 intermediate stage applies no offset outside mainland China, so foreign coordinates receive only the BD09 layer. Display on Baidu Maps abroad may still differ slightly, since Baidu's own handling of overseas data is not standardized.