メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.25736081403 36.6171373997746, 137.25632896761 36.6173750420516, 137.256255274012 36.6171748562266, 137.255780632404 36.6159142027641, 137.255640438986 36.6155191764389, 137.256562652315 36.6152983807719, 137.258251957126 36.6149077212166, 137.25859699139 36.6158549386151, 137.258286066057 36.6159274897082, 137.258626568264 36.6168421815528, 137.25736081403 36.6171373997746)) ^^http://www.opengis.net/ont/geosparql#wktLiteral