メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.132207297317 42.697027945832, 143.130978118517 42.6975075092511, 143.130906912478 42.697408041173, 143.13029519917 42.6965496004028, 143.131512936876 42.6960709757354, 143.132139081923 42.6969377391381, 143.132207297317 42.697027945832)) ^^http://www.opengis.net/ont/geosparql#wktLiteral