2 snapshots on file, newest May 2017.
Archive vintage
9 years old
36,549 parcel features, 24 attributes, 96% weighted attribute fill. Reprojected to WGS 84 (EPSG:4326); geometries repaired where invalid. Point-in-time snapshot. No cross-county schema normalisation.
Each row is a distinct point-in-time snapshot of Portsmouth city, not a revision of one file. Parcel counts move between vintages for real reasons — subdivision, consolidation, annexation, a re-survey — so a jump in the count is information rather than an error. This county's record here spans May 2017 to May 2017.
Archive vintages are released once they are old enough to be non-competitive; community vintages are contributed by users and published as soon as they pass verification. Both are free.