メタデータ名 C4424
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.6500000 42.8833333, 141.6562500 42.8833333, 141.6562500 42.8875000, 141.6500000 42.8875000, 141.6500000 42.8833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral