メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.354113224755 43.7554540652096, 142.354622588017 43.7557877070913, 142.353727995921 43.7564819859365, 142.353239447055 43.7568717140103, 142.352971872839 43.7566841918916, 142.352246769444 43.7561760162072, 142.351734064883 43.7558255428199, 142.352691771136 43.7550771273103, 142.353579850769 43.7544092320015, 142.354086570064 43.7547562759939, 142.3535995059 43.7551172773509, 142.354113224755 43.7554540652096)) ^^http://www.opengis.net/ont/geosparql#wktLiteral