メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.263176346457 44.0264854711939, 144.262787234023 44.02704728352, 144.261477000383 44.0265966231567, 144.261879175412 44.0260289161012, 144.262337843944 44.0261887667161, 144.262525316043 44.0262541010674, 144.263176346457 44.0264854711939)) ^^http://www.opengis.net/ont/geosparql#wktLiteral