メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.32708942116 43.7720461798573, 142.327106967831 43.7720365862401, 142.327541061724 43.7724524379083, 142.327554790458 43.7724450800112, 142.327933304354 43.7728517724338, 142.327307061358 43.7731864906521, 142.326446249258 43.7736465880829, 142.325088368711 43.7743842145123, 142.324666390006 43.7739691198477, 142.324645301643 43.7739802978054, 142.324195663097 43.7735631627669, 142.323667800279 43.7730328933012, 142.325074577953 43.7723286887911, 142.325401420526 43.7721465863835, 142.326568199651 43.7715339934142, 142.32708942116 43.7720461798573)) ^^http://www.opengis.net/ont/geosparql#wktLiteral