メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.767188137224 43.2082664399353, 141.76674042816 43.2086577551088, 141.76638342739 43.2089698415766, 141.764910887873 43.208217219778, 141.765053795763 43.2081579753236, 141.765283457228 43.2080402338786, 141.765382506027 43.2079708876124, 141.765632132307 43.2077961230381, 141.765821872681 43.2075893870068, 141.766770308457 43.2080505275764, 141.767188137224 43.2082664399353)) ^^http://www.opengis.net/ont/geosparql#wktLiteral