メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.332607955875 43.7657467321318, 142.332877148254 43.7658342798013, 142.333321278597 43.7659680063218, 142.333079704998 43.7663898642787, 142.332680426966 43.767084822202, 142.331962070404 43.7668745004859, 142.331130994408 43.7666289177805, 142.331384330031 43.7661887892535, 142.331787006247 43.7655108857404, 142.332607955875 43.7657467321318)) ^^http://www.opengis.net/ont/geosparql#wktLiteral