メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.379353301086 42.9896920446345, 144.377595080899 42.9893927707806, 144.376850595171 42.9892661121449, 144.377206323365 42.9881654683223, 144.377936807474 42.9882920333137, 144.37970617019 42.9885986198228, 144.379353301086 42.9896920446345)) ^^http://www.opengis.net/ont/geosparql#wktLiteral