# Sources + method notes (placeholders)

This site ships with demonstration layers so it works immediately when deployed.
Replace placeholders with authoritative sources and keep the file names stable.

## Footprint {#footprint}
- Replace `footprint.geojson` with: official project boundary (CAD/GIS), or digitized polygon with citation.
- Record:
  - where the boundary came from
  - how it was transformed into GeoJSON
  - projection details
  - date pulled

## Tradeoff {#tradeoff}
- Add:
  - Hermann Park boundary polygon
  - core park area calculation method
  - any land disposition documents

## Flood exposure {#flood}
- Replace `floodplain_proxy.geojson` with:
  - FEMA NFHL export (flood hazard polygons) or local floodplain GIS
- Record:
  - panel/source URL
  - map service / dataset name
  - date pulled

## Cost per bed {#cost}
- Update `metrics.json`:
  - `total_cost`
  - `added_beds`
  - benchmark values with links to comparable projects

## Alternatives {#alternatives}
- Replace `alternatives.geojson` with vetted candidate parcels.
- Record:
  - ownership
  - zoning
  - parcel IDs
  - feasibility memos

## Equity & access {#equity}
- Replace `access_proxy.geojson` with network-based isochrones.
- Record:
  - routing engine (ORS/Valhalla/Mapbox)
  - travel mode & time thresholds
  - date pulled