メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.332057555371 43.0568233830806, 141.331916022682 43.0574125913904, 141.331837794521 43.0577700808559, 141.331740615265 43.0581634257782, 141.331657453622 43.0584851476633, 141.331588452611 43.0587318719058, 141.330033836353 43.0585135218669, 141.33015985743 43.0579433212577, 141.330263423024 43.0575660638749, 141.330355891458 43.057199758249, 141.330504054917 43.056604204949, 141.331128343624 43.0566922818034, 141.332057555371 43.0568233830806)) ^^http://www.opengis.net/ont/geosparql#wktLiteral