メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.445595976658 43.0479461481441, 141.445735475221 43.0484218604854, 141.445469667063 43.0484694380094, 141.445181203102 43.0485210699449, 141.443988617563 43.0487331666778, 141.443571310298 43.0487970413317, 141.443584772477 43.0482998994564, 141.443592133103 43.0481735668599, 141.443610255513 43.0478441250296, 141.444318321437 43.0477166776499, 141.444894553372 43.0476168524081, 141.445459761905 43.0475165956576, 141.445477215803 43.0475752334289, 141.445595976658 43.0479461481441)) ^^http://www.opengis.net/ont/geosparql#wktLiteral