Zonio Geo API

The Zonio Geo API exposes the national land dataset that powers Zonio: every cadastral parcel in Poland, the local and general plans that zone it, the environmental and regulatory constraints that limit it, and the infrastructure around it.

All requests require an API key sent as Authorization: Bearer <key>. Geometry is returned as GeoJSON in WGS84 (EPSG:4326); every distance and area is computed in metres in EPSG:2180 (PUWG 1992).