メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.932484090169 43.8084713616031, 141.932373399454 43.8090605691299, 141.930892111174 43.8089207621235, 141.930774611936 43.808908603692, 141.930865143745 43.8084379007894, 141.930893944832 43.8082945980412, 141.931005161218 43.8077413437993, 141.931135886874 43.8077538367609, 141.932588858188 43.8079136933979, 141.932484090169 43.8084713616031)) ^^http://www.opengis.net/ont/geosparql#wktLiteral