メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.776925469209 34.6139496363404, 135.776229497605 34.6139483546911, 135.77621965818 34.6135340596585, 135.776931086541 34.6135717898919, 135.776925469209 34.6139496363404)) ^^http://www.opengis.net/ont/geosparql#wktLiteral