メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.765382506027 43.2079708876124, 141.765283457228 43.2080402338786, 141.765053795763 43.2081579753236, 141.764910887873 43.208217219778, 141.764306912834 43.2079125986374, 141.764995670166 43.2071561161495, 141.765821872681 43.2075893870068, 141.765632132307 43.2077961230381, 141.765382506027 43.2079708876124)) ^^http://www.opengis.net/ont/geosparql#wktLiteral