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Data Sources
Prefire is built entirely on publicly available geospatial data and open-source models.
Analysis Pipeline
Imagery — Tree Detection
Source ↗NAIP Aerial Imagery
Elevation — Slope Analysis
Source ↗USGS 3DEP Elevation
Building Footprints — Zone Computation
Source ↗Microsoft Building Footprints
Risk Context — WHP Score
Source ↗USFS Wildfire Hazard Potential (WHP)
ML Models — Tree Detection
Source ↗DeepForest & SAM 2
Map & Interface
Satellite Tiles
Source ↗ESRI World Imagery
Street / Topo Tiles
Source ↗ESRI World Topo Map
Building Footprint Overlay
Source ↗Microsoft Building Footprints (map overlay)
County Boundaries
Source ↗U.S. Census TIGERweb API
Address Search
Source ↗Nominatim / OpenStreetMap
Coverage Note
NAIP imagery and 3DEP elevation are currently available for California only. Building footprint coverage is expanding state by state. WHP data is national — all 50 states are covered. Expanding imagery to additional states requires sourcing equivalent datasets and extending the data pipeline. I had to host the images myself due to resolution issues.