Spatial plotting

[teunbrand]

This is just an issue to keep track of the notion that we want to support geospatial plotting.

A first goal with this would be to dish out some simple chloropleths.

• We'd need to understand how geospatial data is stored in databases and what readers support would look like.
• We'd need to understand how writers take geospatial information. If there is only limited support for writers, we can simply render polygons, but we'd have to figure out if/how we can render polygons with holes.

The second step would be to use the PROJECT clause to transform.

• For example, I think we'd like to support named projections like PROJECT TO mercator, PROJECT TO mollweide and PROJECT TO 'goode homolosine', etc.
• If user declares MAPPING foo AS lon, bar AS lat, we should understand this to be a map automatically.

[mdsumner]

wk is the universal glue

[teunbrand]

Good hint, thanks Michael!

[mdsumner]

I long thought gg was perfect for construction of spatial data ie group_by, arrange is how you create lines (or animal tracks). It doesn't really work for polygons because no one stores them that way but they do decompose polygons that way for validity and geometric ops..Anyhoo no coherent or long thoughts here but I'd appreciate any explorations 🙏this project is surprising and not in many ways. There's a marriage of gg and spatial that got buried under the sf era , and I thought euclid would uncover that. Spatial primitives at least fit very neatly here