メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.345803628628 44.4818184909824, 142.345754993968 44.4818071051206, 142.345729424108 44.4818011504253, 142.343691608497 44.481324634462, 142.344028616234 44.480586533448, 142.345021902707 44.4807694426783, 142.346094478601 44.4810390784679, 142.346166149102 44.4810570885243, 142.346152365808 44.4810860334386, 142.345803628628 44.4818184909824)) ^^http://www.opengis.net/ont/geosparql#wktLiteral