メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.876267488142 43.3321818047704, 141.875439584623 43.3323045721376, 141.875129759594 43.3325511155306, 141.872958604067 43.3328945197928, 141.872900602317 43.3326890420855, 141.872849952928 43.3325096807186, 141.872602685857 43.3316399667427, 141.872579809916 43.3315732211801, 141.873743774876 43.331408253895, 141.874844862487 43.331256149867, 141.87492497023 43.331244878187, 141.875958426334 43.3310877595058, 141.875987340686 43.3311641599579, 141.876111310535 43.3315870244258, 141.876267488142 43.3321818047704)) ^^http://www.opengis.net/ont/geosparql#wktLiteral