メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.270097642255 43.0687513435702, 141.270630682545 43.0689455830384, 141.271856230525 43.0694952761195, 141.272848499539 43.0699185506749, 141.272369829782 43.0702252499682, 141.271913207362 43.0705207433496, 141.27180620027 43.0705838283014, 141.271533930411 43.0707539500698, 141.270869775632 43.0711596979498, 141.270368803695 43.0707097344273, 141.270296547783 43.0706508828404, 141.269389784532 43.06983524553, 141.268300105578 43.0689358874225, 141.268492159845 43.0687910383041, 141.269078378384 43.0683632583574, 141.26963768399 43.0685702459166, 141.270097642255 43.0687513435702)) ^^http://www.opengis.net/ont/geosparql#wktLiteral