メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.6125000 43.3416667, 145.6187500 43.3416667, 145.6187500 43.3458334, 145.6125000 43.3458334, 145.6125000 43.3416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral