メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.32778003526 43.0648693705813, 141.328392402606 43.0649584222647, 141.328248856796 43.0655501395512, 141.328109211937 43.0660735276431, 141.327555499527 43.0659998567991, 141.326540150559 43.0658661916152, 141.326677351769 43.0652957355971, 141.326820646002 43.064728071433, 141.32778003526 43.0648693705813)) ^^http://www.opengis.net/ont/geosparql#wktLiteral