District and precinct maps

Open the map's layer button in Canvass, then choose boundaries: congressional districts, state senate and house districts, counties, cities, ZIP code areas, 2020 voting districts, and block groups. They come from the Census Bureau and cover the whole country. They appear as you zoom in.

Shade block groups by population, median household income, or median age from the American Community Survey.

Precincts

Download precinct shapes from the Voting and Election Science Team or the Redistricting Data Hub, convert them to GeoJSON, and add them on Data, Boundaries. Their license credit shows on the map.