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
Current portal

Census 2020 Block Groups

Block groups from the 2020 Census.

Records
60
Formats
5
Last updated
Jul 3, 2025
Download CSVView on ArcGIS Hub

Download & API

Census 2020 Block Groups (CSV)csv
Spreadsheet — attributes, with coordinates for point layers
Download
Census 2020 Block Groups (GeoJSON)geojson
GeoJSON — for web maps and GIS tools
Download
Census 2020 Block Groups (GeoParquet)geoparquet
Columnar — query with DuckDB / SQL
Download
Census 2020 Block Groups (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
GEOIDstring
NAMELSADstring6 values: Block Group 1 (19), Block Group 2 (19), Block Group 3 (14)…
ALANDnumber87,942 to 1,161,780
AWATERnumber0 to 1,649,008
INTPTLATstring
INTPTLONstring
GEOID_numericnumber170,318,087,021 to 170,318,103,023
Total population
Population
integer670 to 2,547
Housing units
HUs
integer36 to 1,299