メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.985883741609 43.558640520631, 144.98504483708 43.5588159430563, 144.984844333382 43.5580012534671, 144.985620062062 43.5578572656115, 144.985818315287 43.5584513138168, 144.985883741609 43.558640520631)) ^^http://www.opengis.net/ont/geosparql#wktLiteral