メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.400573589658 43.7913153062894, 142.400923909455 43.7915346941535, 142.401686350677 43.792014347186, 142.40247719553 43.7925256362566, 142.401579057669 43.7932780018042, 142.401437723618 43.7933915464542, 142.401443654636 43.7933950554505, 142.401367419468 43.793459710664, 142.400993988138 43.7937763869571, 142.398615476045 43.791940109711, 142.398873739119 43.7917090665237, 142.399881698627 43.7908788201119, 142.400573589658 43.7913153062894)) ^^http://www.opengis.net/ont/geosparql#wktLiteral