メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.973582263188 43.5444928321884, 144.973304154076 43.5447011721271, 144.971986420122 43.5438322574414, 144.972392339997 43.5435254525186, 144.972956118592 43.5438900469907, 144.973573469304 43.5443106007585, 144.973453446563 43.5444101865867, 144.973582263188 43.5444928321884)) ^^http://www.opengis.net/ont/geosparql#wktLiteral