メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.379345418962 43.7814289297752, 142.379933255803 43.7824862900603, 142.379167184086 43.782697654368, 142.378411878655 43.7829255108143, 142.377835944207 43.7818636299376, 142.377401079426 43.7811389446946, 142.378196932132 43.7809098907023, 142.378937455037 43.7806802400818, 142.379345418962 43.7814289297752)) ^^http://www.opengis.net/ont/geosparql#wktLiteral