§ Geospatial Data · Personal build · R&D
HomeScope
A US housing-market explorer rendering 33,000+ ZIP polygons that recolor instantly.
33K+
ZIP polygons
$0
tile bill
Instant
recolor
- Role
- Solo build
- Client
- Personal build · R&D
- Year
- 2026
- Lane
- Geospatial Data
The problem
Interactive choropleth maps of the whole US usually mean huge geometry payloads and a monthly tile bill. I wanted a fast, self-hosted alternative.
What I built
A housing-market explorer: 33,000+ ZIP polygons that recolor instantly via feature-state (no geometry refetch), self-hosted PMTiles (no tile bill), a PostGIS dimensional model, and a drift-resilient Python/Pydantic ETL pipeline (extract → validate → normalize → load → tile).
Outcome
A live, fast, zero-tile-cost geospatial data product — proof of data-engineering and mapping depth. Live at homescope.mahmoudamr.dev.
Stack
MapLibre GLPMTiles (self-hosted)PostGISNext.jsPython / Pydantic ETLtippecanoe