メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.361063935922 43.7823512224491, 142.361708521263 43.782809951714, 142.361099737526 43.7832545913656, 142.360480175913 43.7836888122375, 142.358853354862 43.782492311784, 142.359437787309 43.782060663992, 142.360051448355 43.7816172247434, 142.361063935922 43.7823512224491)) ^^http://www.opengis.net/ont/geosparql#wktLiteral