メタデータ名 unitMeasure
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.4812500 43.0875000, 141.4875000 43.0875000, 141.4875000 43.0916667, 141.4812500 43.0916667, 141.4812500 43.0875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral