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Coordinate Conversion Location Services Geographic Data

Geographic Coordinate System Converter

Convert coordinates between WGS84, GCJ-02, and BD-09

What can this API do?

WGS84, GCJ-02, and BD-09

Work with the three coordinate systems commonly encountered across global and China-focused map products.

All source and target combinations

Convert between any supported pair, including same-system normalization when required.

Consistent coordinate order

Receive every result in a predictable [longitude, latitude] array for safer integration.

Map provider normalization

Align coordinates collected from international maps, China map providers, and location datasets.

Geocoding and mobility workflows

Prepare location values for map display, navigation, delivery, fleet, and geospatial analysis.

Safe out-of-region behavior

Preserve coordinates outside the applicable GCJ-02 region instead of applying an unsuitable offset.

Geographic Coordinate System Converter
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API Document

HTTP Protocol:HTTPS

HTTP Method:GET

HTTP Endpoint:https://api.gugudata.io/v1/location/coordinateconverter

Response Type:application/json; charset=utf-8

DEMO Endpoint:https://api.gugudata.io/v1/location/coordinateconverter/demo

Live Demo:Try Interactive Demo

Postman Collection:Run in Postman

API Request Parameters

NameTypeIs RequiredDefault ValueRemark
appkeystringtrueYOUR_APPKEY API key used to authenticate the request.
fromstringtrueWGS84 Source coordinate system. Canonical values are `WGS84`, `GCJ02`, and `BD09`; matching is case-insensitive for compatibility.
tostringtrueGCJ02 Target coordinate system. Canonical values are `WGS84`, `GCJ02`, and `BD09`; matching is case-insensitive for compatibility.
valuestringtrue[120.54,32.74] Coordinate pair in `[longitude,latitude]` format. Longitude must be between -180 and 180; latitude must be between -90 and 90.

API Response Parameters

NameTypeRemark
dataStatusobject Response metadata for the request.
dataStatus.requestParameterstring Privacy-safe summary of the normalized request.
dataStatus.statusCodeinteger Application-level status code.
dataStatus.statusDescriptionstring Human-readable application status message.
dataStatus.responseDateTimestring Time at which the response was generated.
dataStatus.dataTotalCountinteger Number of matching or returned records for this request.
dataobject Converted coordinate result.
data.coordinateFromstring Normalized source coordinate system.
data.coordinateTostring Normalized target coordinate system.
data.coordinateSourceValuestring Validated source coordinate in `[longitude,latitude]` format.
data.coordinateDestinationValuestring Converted coordinate in `[longitude,latitude]` format.

API Response Status Codes

Status CodeExplanation of Status CodeRemarks
200Request processed successfully.Some endpoints expose a separate application-level status field in the response body, such as `dataStatus.statusCode`.
400Invalid request parameters or request format.Check required fields, data types, and request body format.
401Missing or unknown application key.Provide a valid `appkey` with the request.
403The application key is recognized but access is not allowed.The key may be expired, inactive, or not permitted for the requested API.
429Request rate or trial usage limit exceeded.Reduce concurrency or retry after the limit window resets.
500Internal service error.Retry later or contact support if the error persists.
503Upstream service unavailable.Retry later; the requested upstream dependency is temporarily unavailable.

Remote MCP

AI client access

Use this API through GuGuData Remote MCP

Connect your AI client once, authorize in the browser, and the client can use the GuGuData API tools available to your account. You do not need to paste an appkey into the MCP client.

Endpoint https://mcp.gugudata.io/mcp
Open MCP Guide
Generic MCP configuration
{
  "mcpServers": {
    "gugudata": {
      "url": "https://mcp.gugudata.io/mcp",
      "transportType": "streamable-http"
    }
  }
}

Code Snippets