Data Sources

Prefire is built entirely on publicly available geospatial data and open-source models.

Analysis Pipeline

Imagery — Tree Detection

NAIP Aerial Imagery

Elevation — Slope Analysis

USGS 3DEP Elevation

Building Footprints — Zone Computation

Microsoft Building Footprints

Risk Context — WHP Score

USFS Wildfire Hazard Potential (WHP)

ML Models — Tree Detection

DeepForest & SAM 2

Map & Interface

Satellite Tiles

ESRI World Imagery

Street / Topo Tiles

ESRI World Topo Map

Building Footprint Overlay

Microsoft Building Footprints (map overlay)

County Boundaries

U.S. Census TIGERweb API

Address Search

Nominatim / OpenStreetMap

How the tool uses this data →How the score is calculated →Have a dataset to share? →