Tasks

Based on (https://github.com/vega/altair/issues/1711#issuecomment-2567162567), (https://github.com/vega/altair/issues/1711#issuecomment-538451439)

[!TIP] The tasks below should be completed in order of appearance. Earlier tasks can be performed by any contributor (new or old) familiar with alt.Chart.mark_geoshape

• Find an appropriate dataset
  • Contains a categorical field, not directly dependent on location
  • License that enables adding to vega/vega-datasets and using/transforming within vega projects (non-commercial)
    • Current dataset licenses: 1, 2
• Demonstrate using the dataset (in this issue)
  • Should be possible using a remote URL - e.g. GeoJSON, TopoJSON
• Open an upstream issue, linking back to this one
• Follow up by opening an upstream PR

Example (not altair)

(https://github.com/vega/altair/issues/1711#issuecomment-2567159598) @mattijn

Maybe something like species richness for a limited number of species. Similar to below, from here, but then preferably aggregated per county, instead of raster cells: