メタデータ名 C4926
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.4062500 40.5708334, 141.4125000 40.5708334, 141.4125000 40.5750000, 141.4062500 40.5750000, 141.4062500 40.5708334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral