メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.986042859342 43.55919872958, 144.985302773647 43.5597328719853, 144.98504483708 43.5588159430563, 144.985883741609 43.558640520631, 144.986042859342 43.55919872958)) ^^http://www.opengis.net/ont/geosparql#wktLiteral