Format shp
Parcel Data in Shapefile
The format every desktop GIS reads without being asked, and the one most county assessors still publish.
- Datasets available
- 0
- Extension
- .zip (.shp/.shx/.dbf/.prj)
- Media type
- application/zip
- Geometry
- yes
Take it when
Anything that has to open on someone else's machine without a conversation about drivers. Thirty years of tooling assumes it.
Watch out for
Field names are truncated to 10 characters and the DBF attribute table has no real text encoding declaration, so long assessor column names arrive mangled. The 2 GB per-file ceiling is a real limit on the biggest urban counties.
Reads it QGISArcGIS ProGeoPandasGDAL/OGRPostGIS shp2pgsql
Counties available as Shapefile
Nothing is published as Shapefile yet. Every dataset here is converted on publish, so this fills in as the catalog grows.
Other formats
geojson
GeoJSON
Plain text, WGS84, readable in a browser and in a code review. The web's parcel format.
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.