About

ctzn-geo has two aims. The first is to show data on subjects we want to understand, mapped from US block groups up to the world’s countries: census estimates, presidential returns, and health, climate, income and population data. Each map also shows how one choice behind it, the geography, the class rule, the colours, the form or the projection, changes what the same numbers appear to say.

The second is to build reusable map components in TypeScript for other projects. Every map on the site is drawn with them, and the component catalog lists each one with its input contract, its behaviour when data is missing and its known limits.