メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.031824322784 43.5642909648218, 142.032714230301 43.5644072365268, 142.032568817594 43.5654038639517, 142.03104063994 43.565297884368, 142.028595978609 43.5650836942501, 142.029291462912 43.5645570501706, 142.030068383083 43.5639715205523, 142.031052721127 43.5641405198998, 142.031824322784 43.5642909648218)) ^^http://www.opengis.net/ont/geosparql#wktLiteral