メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.995043544541 43.5582944426691, 144.994574136496 43.5579868270127, 144.99421475474 43.5577512799838, 144.994154560059 43.5577118013222, 144.994882077015 43.5571033623675, 144.994960940013 43.5571578634857, 144.995388607664 43.5574492172046, 144.995781387291 43.5577132454535, 144.995043544541 43.5582944426691)) ^^http://www.opengis.net/ont/geosparql#wktLiteral