メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.3625000 44.2791667, 142.3687500 44.2791667, 142.3687500 44.2833333, 142.3625000 44.2833333, 142.3625000 44.2791667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral