メタデータ名
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.7312500 44.3500000, 141.7375000 44.3500000, 141.7375000 44.3541667, 141.7312500 44.3541667, 141.7312500 44.3500000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral