メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.005218731527 43.5717515749624, 145.004152671465 43.5710592932149, 145.004398200442 43.5708657987788, 145.005548113876 43.5699501530525, 145.005735525429 43.5698014430704, 145.00639161996 43.5702291842705, 145.006776467506 43.5704775099645, 145.005218731527 43.5717515749624)) ^^http://www.opengis.net/ont/geosparql#wktLiteral