メタデータ名 C18461-19930204
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.4562500 36.1958334, 139.4625000 36.1958334, 139.4625000 36.2000000, 139.4562500 36.2000000, 139.4562500 36.1958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral