メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.380612545828 42.9909862430903, 144.380234362142 42.9910867586559, 144.378981171938 42.990760720327, 144.379353301086 42.9896920446345, 144.380925549171 42.9899759819165, 144.380894764537 42.9900775474985, 144.380612545828 42.9909862430903)) ^^http://www.opengis.net/ont/geosparql#wktLiteral