Format geojson

Parcel Data in GeoJSON

Plain text, WGS84, readable in a browser and in a code review. The web's parcel format.

Datasets available: 0
Extension: .geojson
Media type: application/geo+json
Geometry: yes

Take it when

Web maps, quick inspection, scripting, and diffing two vintages in version control.

Watch out for

It is uncompressed JSON, so a large county runs to hundreds of megabytes, and the spec pins coordinates to WGS84 — if you need the county's own state-plane CRS for area calculations, take the GeoPackage instead.

Reads it LeafletMapLibreQGISGDAL/OGRPython json

Counties available as GeoJSON

Nothing is published as GeoJSON yet. Every dataset here is converted on publish, so this fills in as the catalog grows.

Other formats

shp Shapefile The format every desktop GIS reads without being asked, and the one most county assessors still publish. gpkg GeoPackage One SQLite file, full-length field names, real CRS metadata, no sidecar files to lose. csv CSV The attribute table with the geometry left behind — parcel IDs, owners, addresses, valuations. parquet GeoParquet Columnar, compressed, and typed. Built for reading one column of ten million parcels rather than one parcel at a time.