メタデータ名
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.5937500 42.8875000, 141.6000000 42.8875000, 141.6000000 42.8916667, 141.5937500 42.8916667, 141.5937500 42.8875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral