メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.041568366757 43.5764945991176, 142.040234947037 43.5767444737092, 142.040018116967 43.5765031194437, 142.039637267463 43.5766090592892, 142.0396782229 43.5768979589655, 142.039301000578 43.5768147639057, 142.039017622447 43.5767066265502, 142.038703759658 43.5764916798821, 142.039330550032 43.5748438306516, 142.039522321254 43.5743728489441, 142.039752593001 43.5744166156662, 142.039904042774 43.5743319668754, 142.04093678392 43.5756774704239, 142.041568366757 43.5764945991176)) ^^http://www.opengis.net/ont/geosparql#wktLiteral