メタデータ名
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.5187500 43.6833333, 142.5250000 43.6833333, 142.5250000 43.6875000, 142.5187500 43.6875000, 142.5187500 43.6833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral