メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.363394078755 43.7732612571279, 142.363450067454 43.7732457140828, 142.363665946236 43.7736315295776, 142.363838066955 43.7739111155157, 142.363468167172 43.774016890193, 142.362992774367 43.7739016232675, 142.362457936132 43.7747525521057, 142.362428566629 43.7747449332567, 142.362055819258 43.7741024560785, 142.3618527068 43.7736894463262, 142.361609620007 43.7731891546719, 142.362781577865 43.7728307350386, 142.36311500342 43.7727345091841, 142.363394078755 43.7732612571279)) ^^http://www.opengis.net/ont/geosparql#wktLiteral