メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.879160284608 43.0199183777748, 142.878024114918 43.0192444499477, 142.878154293383 43.0191335313091, 142.879074636834 43.0183466380637, 142.879617123191 43.0186648555184, 142.880231778947 43.0190334514838, 142.879917753104 43.0193114995124, 142.879465070953 43.0197108522828, 142.879295998304 43.0198331682004, 142.879264555764 43.0198139293782, 142.879160284608 43.0199183777748)) ^^http://www.opengis.net/ont/geosparql#wktLiteral