メタデータ名 obsType
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.4687500 34.9666667, 134.4750000 34.9666667, 134.4750000 34.9708334, 134.4687500 34.9708334, 134.4687500 34.9666667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral