GET/coordinates/transform

API key required, sent as Authorization: Bearer snk_… or ?api_key=snk_….

Call it

bash

curl -fsS -X GET "https://api.mapmap.ai/coordinates/transform?coords=…" \
  -H "Authorization: Bearer $MAPMAP_KEY"

Parameters

Name	In	Required	Description
coords	query	yes	Semicolon-separated `x,y` or `x,y,z` pairs in the source CRS, at most 50. For a geographic CRS, x is longitude and y is latitude
s_srs	query	no	Source CRS, `EPSG:<code>` or a bare code; defaults to EPSG:4326
t_srs	query	no	Target CRS, `EPSG:<code>` or a bare code; defaults to EPSG:4326

Responses

200{s_srs, t_srs, results: [{x, y, z?} | null]} in input order. An entry is null where the projection has no solution there (a pole projected into Mercator, a grid coordinate the inverse cannot solve): an honest "no answer", never a guess. Any z rides through unchanged: no vertical datum is applied

400Malformed coords, more than 50 pairs, or a CRS outside the supported table (the problem names the code and points at GET /coordinates/crs)

401Missing or invalid API key

429Quota or rate limit exceeded

Error bodies follow the shared problem model documented on API conventions.

Also under coordinates

GET /coordinates/crs

Generated from https://api.mapmap.ai/openapi.json on 2026-09-17 · operationId get_transform