Hierarchies, maps and symbol libraries
Geo choropleth
Country-level records coloured on a bundled world map — geography as a data view, with the projection named.
geo.choropleth@1New DDN source
Why use it?
Distribution questions with a spatial answer deserve a map, and the map ships with the runtime (no remote tiles).
When it helps
Adoption, incident or market data keyed by country code.
How to read it
- Colour encodes the declared value per country record; grey is no declared record, not zero.
- The map projection (equalEarth here) is declared in the view — area distortion is a choice, not an accident.
What you need
- Country-keyed records (ISO codes)
- The value field
- The geography asset (bundled)
Things to check
- Do not key by country name — codes, or the join silently drops rows.
- A choropleth normalises nothing; rates versus totals is your modelling decision.
Scope of this diagram
Declared records on the bundled 110m geography; boundary politics follow the asset, not the author.
Work with the converted example
- Open the viewer and select
choropleth. Inspect the rendered view and its source. - Open the designer. Keep the selected profile and inspect its legal palette and property controls.
- Change one displayed title or an appropriate data value. Apply the edit and check the resulting diagram.
- Run the verifier and review its diagnostics before moving complete content into review.
- Download your edited DDN source to retain the change.
The example uses the indentation-based ddn-next-1 dialect. The language guide explains reusable definitions, dotted data rows and explicit property blocks.