メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.952431204895 43.5509034999701, 144.952087892388 43.5509491004377, 144.951811820708 43.5509502849835, 144.952058258512 43.550744822495, 144.953262871519 43.5497412549625, 144.953583359014 43.5499679016056, 144.953402592941 43.5501283568489, 144.954149509203 43.5506629973563, 144.953920405015 43.5507025940308, 144.953056117697 43.5508204373319, 144.952431204895 43.5509034999701)) ^^http://www.opengis.net/ont/geosparql#wktLiteral