メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.34604143889 43.0844571829, 141.345846061134 43.0851825574297, 141.345668883189 43.0859293848869, 141.345155659008 43.0858491563082, 141.344605408388 43.0857746815005, 141.344149381948 43.0857200090249, 141.344287148399 43.0849597199234, 141.344369911269 43.0846566249061, 141.344481578951 43.0842477032131, 141.345003552879 43.084319212031, 141.34604143889 43.0844571829)) ^^http://www.opengis.net/ont/geosparql#wktLiteral