メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.956058119445 43.5470696406774, 144.956337742443 43.5472473563521, 144.955815266474 43.5476567151974, 144.955533431173 43.5474770812761, 144.955235700169 43.5472964864364, 144.955773074028 43.5468657524994, 144.956058119445 43.5470696406774)) ^^http://www.opengis.net/ont/geosparql#wktLiteral