メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.390391372223 42.9843053617479, 144.390330612615 42.9844976449935, 144.390203909372 42.9848984856211, 144.388562689684 42.9846116174403, 144.388750462942 42.9840215120234, 144.389602329773 42.984168865183, 144.390391372223 42.9843053617479)) ^^http://www.opengis.net/ont/geosparql#wktLiteral