According to the GeoJSON specification [1]: > For type "LineString", the "coordinates" member is an array of two or > more positions. Note that the same doesn't seem to apply to a MultiPoint [2]: > For type "MultiPoint", the "coordinates" member is an array of > positions. [1] https://datatracker.ietf.org/doc/html/rfc7946#section-3.1.4 [2] https://datatracker.ietf.org/doc/html/rfc7946#section-3.1.3