Proof of concept.This is an unofficial demo built by Datopian from the City of Evanston's public data. The official portal is data.cityofevanston.org. Questions or feedback: hello@datopian.com

A PortalJS proof of concept · data from the City of Evanston's ArcGIS Hub

Traffic circles

Traffic circles are a traffic calming device employed by the City of Evanston along with speed humps.

Records
18
Formats
5
Last updated
Jul 3, 2025

Download & API

Traffic circles (CSV)csv
Spreadsheet — attributes, with coordinates for point layers
Download
Traffic circles (GeoJSON)geojson
GeoJSON — for web maps and GIS tools
Download
Traffic circles (GeoParquet)geoparquet
Columnar — query with DuckDB / SQL
Download
Traffic circles (map tiles)pmtiles
Vector tiles — embed in a map
Download
Live ArcGIS layer (source)arcgis
Download

Rendered from PMTiles, queried in-browser from GeoParquet — no server. How this works

Schema

FieldTypeValues
Namestring
Greenways asset
GreenwaysAsset
string1 values: Yes (18)