メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.375555576953 43.7633801616579, 142.375849660022 43.763916746408, 142.374336458771 43.7643412828033, 142.374039046598 43.7638026404207, 142.373741635968 43.7632682170977, 142.375238709489 43.7628388888629, 142.375546236354 43.7633631362167, 142.375555576953 43.7633801616579)) ^^http://www.opengis.net/ont/geosparql#wktLiteral