メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.933630842531 43.8323711903393, 143.934457502262 43.8332135705826, 143.934767730668 43.8335296140959, 143.933856127931 43.8339911888764, 143.931964504313 43.8349489588946, 143.930435764125 43.8327317453868, 143.930965785509 43.8324629528527, 143.931902265081 43.8319880059422, 143.93230930153 43.831781565027, 143.932805403268 43.8315299640058, 143.933630842531 43.8323711903393)) ^^http://www.opengis.net/ont/geosparql#wktLiteral