メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.310146236338 43.0943193770151, 141.309980416044 43.0944128877366, 141.309940510088 43.0944368931763, 141.309059971728 43.0949664697237, 141.308039973584 43.0940627279166, 141.3084952576 43.0937667326772, 141.308906233034 43.0935251585191, 141.309763219245 43.0930220420628, 141.309967456284 43.0932086142974, 141.310805542871 43.0939476211055, 141.310146236338 43.0943193770151)) ^^http://www.opengis.net/ont/geosparql#wktLiteral