メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.350921097088 43.0522730284948, 141.350776161062 43.0528462028235, 141.350653363876 43.0534004202796, 141.349092260451 43.053184674148, 141.349126936947 43.0530563128219, 141.349169521422 43.0528988285805, 141.349241201846 43.0526338277336, 141.349391676673 43.0520566200679, 141.349945510308 43.052134684448, 141.350921097088 43.0522730284948)) ^^http://www.opengis.net/ont/geosparql#wktLiteral