メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.030782783465 42.9169682677003, 143.029389852472 42.9168689395339, 143.028513358146 42.9162943021854, 143.028605996162 42.9155850082682, 143.030965747581 42.9157454946409, 143.030782783465 42.9169682677003)) ^^http://www.opengis.net/ont/geosparql#wktLiteral