メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.482259734805 42.9752805546544, 144.481738805016 42.9765172219994, 144.480011524753 42.9777141079328, 144.479920454723 42.9776536432204, 144.479618991285 42.977453600522, 144.479722218216 42.9771083930424, 144.479711513446 42.9768121027696, 144.479395226429 42.9762279406298, 144.482107563734 42.9749658561119, 144.48246190429 42.9748009176284, 144.482259734805 42.9752805546544)) ^^http://www.opengis.net/ont/geosparql#wktLiteral