Data

These are the exact GeoJSON files our map loads. They are public. Use them for your own analysis, your own maps, a school project, or a presentation to the city — no permission needed, though we would love to hear what you build.

Every file is GeoJSON in WGS 84 (EPSG:4326), which opens directly in QGIS, ArcGIS, Mapbox, Leaflet, geopandas, and most other mapping tools.

A manifest lists every layer with its feature count and a set of summary statistics.

What is in each layer

Sidewalks — 245 miles of sidewalk segments, each tagged with tree cover and width. About 47% of sidewalk mileage has tree cover; 167 segments are flagged as low-shade and 30 as narrow.

Bikeways — 40 miles of bikeway, classified the way Caltrans does: Class 1 paths, Class 2 painted bike lanes, Class 3 signed routes, and Class 4 separated lanes. Only about 20 of those 40 miles are path or physically separated; the rest is paint or signage.

Crosswalks — every marked crossing, tagged by whether it is signal- or stop-controlled and by how many lanes the person crossing has to cover. 218 crossings span four or more lanes, and 41 of those are uncontrolled.

Curb ramps — 2,640 ramp locations with tactile-surface status. 841 locations are recorded as missing a ramp entirely.

Speed limits — posted speed limits by street segment.

Pedestrian destinations — the places people actually walk to: 20 schools, 30 parks and open spaces, 35 shopping and retail destinations, 7 major transit stops, and civic, senior, medical, and worship destinations.

Community reports — problems neighbors have reported through the map, after review. Names, email addresses, and photos are never published.

Caveats

This data was assembled to support advocacy, not to serve as a legal record. It is a snapshot, it will drift as streets change, and it certainly contains errors. For anything authoritative — a property line, a permit, a design standard — go to the City of Walnut Creek or Contra Costa County directly.

If you find something wrong, tell us and we will fix it.