メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.355506200279 43.7872942764437, 142.3541445548 43.7882851490257, 142.3540232777 43.7883759760668, 142.353768116702 43.7881838960346, 142.35384880809 43.7881285489486, 142.353606110254 43.787943418791, 142.353110664519 43.7875728422584, 142.352917167444 43.7874093149933, 142.35294088028 43.7873912387113, 142.353026029791 43.7873098681801, 142.352640995464 43.787028823153, 142.35326960265 43.7865738982176, 142.353821413967 43.7861633791422, 142.353866407475 43.7861298990169, 142.355506200279 43.7872942764437)) ^^http://www.opengis.net/ont/geosparql#wktLiteral