メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.055372803818 43.5530796787508, 142.055500039032 43.5519616526263, 142.055645642763 43.5518807827437, 142.058367232162 43.5541576507423, 142.057846084414 43.5546734747862, 142.056958194068 43.5555018277747, 142.056539666893 43.5559296702642, 142.055888519356 43.5558857770639, 142.05496257435 43.5558215465001, 142.055025670899 43.5553194070486, 142.055236049051 43.5539971624299, 142.055238125013 43.5539165056961, 142.055302673351 43.5535239663963, 142.055372803818 43.5530796787508)) ^^http://www.opengis.net/ont/geosparql#wktLiteral