メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.321380709355 43.0633877796332, 141.321250733048 43.0639722125897, 141.320470551527 43.06386305602, 141.319890765869 43.0637842886295, 141.320000387267 43.063373122143, 141.320037676256 43.0631843811496, 141.320200439875 43.0626333405236, 141.320824142059 43.0627186528719, 141.321498727044 43.0628137992695, 141.321380709355 43.0633877796332)) ^^http://www.opengis.net/ont/geosparql#wktLiteral