メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.370077941904 43.0741668234336, 141.370043390869 43.0741678235767, 141.369396280355 43.0740759914533, 141.368686662519 43.073981212372, 141.368835022681 43.0735430063875, 141.369016367267 43.0728313323844, 141.370352624181 43.0730055452935, 141.370205531882 43.0736241580549, 141.37013479105 43.0739216705817, 141.370077941904 43.0741668234336)) ^^http://www.opengis.net/ont/geosparql#wktLiteral