メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.32374972001 43.0476869454673, 141.323678869872 43.0479597423403, 141.32360170651 43.0482568919841, 141.323541943114 43.0485192999741, 141.323415328717 43.0490689529617, 141.322766074818 43.0489763438269, 141.322080743298 43.048885266774, 141.322215251884 43.0484805575388, 141.322315812706 43.04815216138, 141.322445290837 43.0477183645988, 141.3225456696 43.0474209115896, 141.322620537197 43.0471490617734, 141.32374972001 43.0476869454673)) ^^http://www.opengis.net/ont/geosparql#wktLiteral