A GeoJSON object with type GeometryCollection is a Geometry object. A GeometryCollection has a member with the name geometries. The value of geometries is an array. Each element of this array is a GeoJSON Geometry object.

  • you should avoid nested GeometryCollections
  • GeometryCollections composed of a single part should be avoided
  • a number of parts of a single type should be avoided when that single part or a single object of multipart typ (MultiPoint, MultiLineString, or MultiPolygon) could be used instead