メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.582402687082 36.4955946214279, 136.583573946769 36.4956822222012, 136.583492222412 36.4963600310195, 136.583440225762 36.4968000050256, 136.582269737084 36.4967994692853, 136.581838015358 36.4967903875435, 136.581423710591 36.4967844896689, 136.581535257327 36.4963182285532, 136.581619901327 36.4955498525496, 136.582402687082 36.4955946214279)) ^^http://www.opengis.net/ont/geosparql#wktLiteral