Currently, it is possible (and has been observed with NDS.Live tiles) that feature IDs within the tile feature layer are non-unique. This is against the mapget feature model spec, and should not happen. So, inserting a feature into the feature layer with an ID that collides with the ID of another feature, the new feature should be rejected.
Currently, it is possible (and has been observed with NDS.Live tiles) that feature IDs within the tile feature layer are non-unique. This is against the mapget feature model spec, and should not happen. So, inserting a feature into the feature layer with an ID that collides with the ID of another feature, the new feature should be rejected.