メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.260319576194 44.0235234660029, 144.259977302987 44.0240182026485, 144.258675268113 44.0235768028859, 144.258820787769 44.0233710268405, 144.259034821529 44.0230683663843, 144.260319576194 44.0235234660029)) ^^http://www.opengis.net/ont/geosparql#wktLiteral