Is this a valid MultiPolygon?

[dmtucker]

{
    "type": "MultiPolygon",
    "coordinates": []
}

Similar questions could be asked of MultiPoint and MultiLineString.

[dmtucker]

Leaflet emits this error: Cannot read property 'lat' of undefined (repro on http://geojsonlint.com/).

Edit: Leaflet/Leaflet#2642 This is expected behavior for Leaflet.

[dmtucker]

The value of the coordinates member is always an
array. The structure of the elements in this array is determined by
the type of geometry. GeoJSON processors MAY interpret geometry
objects with empty coordinates arrays as null objects.

https://datatracker.ietf.org/doc/draft-butler-geojson/?include_text=1