メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.261040142863 34.6883689383504, 135.260397739785 34.6924146137238, 135.25991211653 34.6921749212106, 135.25713991329 34.6907018318326, 135.255131523215 34.6896984108487, 135.255274849744 34.6888454495721, 135.255469462156 34.6876968728498, 135.258119512627 34.6880125665647, 135.261040142863 34.6883689383504)) ^^http://www.opengis.net/ont/geosparql#wktLiteral