メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.906512946133 43.4921947314658, 141.906489958395 43.4921989879704, 141.906210259859 43.491280461407, 141.907003207274 43.4911608181678, 141.907039292014 43.4911553701294, 141.907286760611 43.491997846755, 141.907128116377 43.4920471993041, 141.906806972505 43.4921401607108, 141.906512946133 43.4921947314658)) ^^http://www.opengis.net/ont/geosparql#wktLiteral