Integrates USGS PAD-US 4.0 (651k features) into a local PostGIS database
for point-in-polygon land ownership queries. Adds /api/landclass endpoint
returning classifications, public/private status, and management hierarchy.
- lib/landclass.py: connection pool, lookup_landclass(), domain label maps
- lib/api.py: GET /api/landclass?lat=&lon= (feature-flag gated)
- home.yaml: enable has_landclass flag
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
