メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.916473583039 43.5037772138032, 141.914684629255 43.5040936444366, 141.912857456336 43.5043738915898, 141.912653244761 43.5036828971929, 141.91239281091 43.5028581168226, 141.912369126579 43.5027789997664, 141.913974447367 43.5025316883643, 141.914146865569 43.5029314021976, 141.914331662986 43.5031821301605, 141.914649884945 43.5034715081174, 141.914897472474 43.5035938639523, 141.915340811203 43.5037098313433, 141.915846682606 43.5037391277439, 141.916473583039 43.5037772138032)) ^^http://www.opengis.net/ont/geosparql#wktLiteral