メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.390101830899 43.7449234195862, 142.387591268236 43.7450601414968, 142.385644440975 43.7451833471361, 142.385584351067 43.744542138472, 142.387529029979 43.7444258978729, 142.3900078896 43.7442960728555, 142.390042180253 43.744535564642, 142.390101830899 43.7449234195862)) ^^http://www.opengis.net/ont/geosparql#wktLiteral