メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.381497983914 42.9745205819618, 144.381492507803 42.9745284193122, 144.380739423824 42.9755949665134, 144.380184523027 42.9763995776585, 144.38014171492 42.9763913032346, 144.379914667072 42.9763396230479, 144.379747066281 42.9762843747805, 144.379535555431 42.9762055392871, 144.379290816606 42.9761074209688, 144.379869799906 42.9752733907563, 144.380623289697 42.9742071218559, 144.381159480816 42.9734604567418, 144.38176148509 42.9734324968721, 144.382272266634 42.9734086267965, 144.381497983914 42.9745205819618)) ^^http://www.opengis.net/ont/geosparql#wktLiteral