メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.15960217272 35.0947767033679, 137.159825310033 35.0951574444526, 137.15984776723 35.0951969552731, 137.160082977012 35.0956109386215, 137.160322759521 35.0960560510455, 137.158855370178 35.0961381411586, 137.15871821419 35.0956839414929, 137.158585988449 35.0953070713537, 137.158482195716 35.0949411901051, 137.158349987827 35.0944809391402, 137.159331526768 35.0943346837003, 137.15960217272 35.0947767033679)) ^^http://www.opengis.net/ont/geosparql#wktLiteral