メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.918839986116 43.5421282671039, 141.919943665089 43.5427627154151, 141.919461583302 43.5432120694142, 141.919038744535 43.5436062123036, 141.91846438531 43.5441415134589, 141.918394200489 43.5442069575952, 141.91717391547 43.5434857275021, 141.91715113784 43.5434745148128, 141.917456785576 43.543231341794, 141.916680234143 43.5427961001858, 141.916663753065 43.5427868752424, 141.91704107769 43.5424391639889, 141.917432537642 43.5420784122821, 141.917924657128 43.5416020914957, 141.918230889525 43.5417781201903, 141.918839986116 43.5421282671039)) ^^http://www.opengis.net/ont/geosparql#wktLiteral