メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.357355656785 43.0525098619825, 141.357272385775 43.0528623389014, 141.357247014071 43.0529652442917, 141.357210240443 43.0531203159056, 141.355618291318 43.0529075812842, 141.355774216715 43.05233399478, 141.355929921771 43.0516629284494, 141.35652565022 43.0517422021485, 141.356574477942 43.0515429177542, 141.356771779922 43.0517320981171, 141.357531141104 43.0518293828513, 141.357355656785 43.0525098619825)) ^^http://www.opengis.net/ont/geosparql#wktLiteral