メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.98377928576 43.5526810004149, 144.98342845249 43.5529830112972, 144.983102272979 43.5527744457714, 144.983478576311 43.552483992393, 144.98377928576 43.5526810004149)) ^^http://www.opengis.net/ont/geosparql#wktLiteral