Elastic-Spatial: Simplify geometries

[EricKrg]

Describe the feature: Simplify reduces the complexity and weight of a geometry using the Douglas-Peucker algorithm. It in general reduces the number of vertices in a polygon, multipolygon, line, or multi-line geometry. It takes 2 arguments, the geometry and the tolerance.

This functionality already exists in spatial db like PostGIS and can speed up geoprocessing as well as visualizing spatial-geometries.

See: https://postgis.net/docs/ST_Simplify.html

[elasticmachine]

Pinging @elastic/es-analytics-geo

[wchaparro]

Discussed this one as a team, removing the team-discuss label. We’ll add this to our roadmap, but we need to do some initial investigation and prototyping to determine a plan. Add to spacetime list as well for initial prototyping and investigation.