メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.429584875912 43.8094894502214, 142.430100761236 43.8098043440799, 142.430122906116 43.8098178458603, 142.430635882696 43.8101324419005, 142.429454371038 43.8111177732956, 142.428929565752 43.8107861550125, 142.427878031024 43.8101187644942, 142.428586233217 43.8095004491699, 142.42900996904 43.809130204515, 142.429584875912 43.8094894502214)) ^^http://www.opengis.net/ont/geosparql#wktLiteral