メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.081229579023 43.5369763266521, 142.081182545675 43.5369789984611, 142.080283950251 43.5371643501476, 142.080327118292 43.5368576966486, 142.080577253461 43.5355392118752, 142.081452109486 43.5356287902467, 142.081448378038 43.5356448542767, 142.081229579023 43.5369763266521)) ^^http://www.opengis.net/ont/geosparql#wktLiteral