メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.772865779646 35.4060825099169, 136.77167077397 35.4061055327798, 136.771617958558 35.4048003976391, 136.771980998106 35.4050243845704, 136.772827758497 35.4055077546148, 136.772865779646 35.4060825099169)) ^^http://www.opengis.net/ont/geosparql#wktLiteral