Choropleth Map
A choropleth map shades geographic regions — countries, states, counties, or NUTS regions — by a data value, so spatial patterns in demographic, economic, or election data jump out immediately.
Mapji ships with built-in boundaries for countries (ADM0), states (ADM1), counties (ADM2), and European NUTS1–3 regions, so you just match your data to region names and pick a color scale — no shapefiles to wrangle. If your regions are not an administrative division at all, such as sales territories or catchment areas, you can upload your own boundary file instead.
What you can do
- Country & region boundaries
- Custom color scales & legends
- Data-driven styling
How to create a choropleth map
- 1
Create a Choropleth map
Start a new site and choose the Choropleth type.
- 2
Pick a geography
Search the catalog for a country and level (states, counties, NUTS regions).
- 3
Join your data
Upload values or connect a Google Sheet; Mapji matches them to regions by name or code.
- 4
Style & publish
Choose a color scale and legend, then publish to your domain.
Choropleth Map FAQ
How does Mapji match my data to each region?
It joins on region name first, then falls back to standard codes — ISO 3166-2 for states and provinces, NUTS codes for European regions, ISO3 for countries — and finally to a partial name match. Unmatched rows are reported so you can correct them.
Which regions are supported?
Countries, states/provinces, counties, and European NUTS1–3 regions are built in, sourced from geoBoundaries and Eurostat GISCO.
Step-by-step guides
Most bad maps are the right data in the wrong form. What all ten map types are actually for, and the mismatches that make maps unreadable.
Heatmaps and choropleth maps answer different questions. When to use each, and the specific mistake each one invites if you pick wrong.