メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.7506835279 43.1883199279574, 141.750144062677 43.1888248512288, 141.7480263164 43.1877303506947, 141.7506835279 43.1883199279574)) ^^http://www.opengis.net/ont/geosparql#wktLiteral