Union of GeoJSON objects.
The valid values for the "type" property of GeoJSON geometry objects. https://tools.ietf.org/html/rfc7946#section-1.4
The value values for the "type" property of GeoJSON Objects. https://tools.ietf.org/html/rfc7946#section-1.4
Geometry object. https://tools.ietf.org/html/rfc7946#section-3
A Position is an array of coordinates. https://tools.ietf.org/html/rfc7946#section-3.1.1 Array should contain between two and three elements. The previous GeoJSON specification allowed more elements (e.g., which could be used to represent M values), but the current specification only allows X, Y, and (optionally) Z to be defined.
Bounding box https://tools.ietf.org/html/rfc7946#section-5