メタデータ名
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.9812500 43.7958334, 141.9875000 43.7958334, 141.9875000 43.8000000, 141.9812500 43.8000000, 141.9812500 43.7958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral