メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.129231552987 34.6478495990611, 135.129142383096 34.6479358232412, 135.128934165407 34.647835766093, 135.12809058563 34.6474558873082, 135.128016702369 34.647429324747, 135.128249043399 34.647200182409, 135.129231552987 34.6478495990611)) ^^http://www.opengis.net/ont/geosparql#wktLiteral