メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.35475905896 43.0702947384568, 141.354611398124 43.0708697218365, 141.354609261508 43.0708780744319, 141.353931024229 43.0707866779823, 141.353601768939 43.0707423217478, 141.35280706893 43.0706382605026, 141.352945990844 43.0700914132811, 141.352946375536 43.070065042626, 141.353072674853 43.0695086726355, 141.354896127849 43.0697552583807, 141.35475905896 43.0702947384568)) ^^http://www.opengis.net/ont/geosparql#wktLiteral