メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.044639360083 36.7641748738923, 137.045368039692 36.7654178647076, 137.045546093796 36.7657027721567, 137.044828619707 36.7658913911145, 137.043627910868 36.766208509351, 137.042911738242 36.7650067730791, 137.042702718068 36.7645657402566, 137.041788452743 36.7648111018444, 137.040991915168 36.765044470097, 137.040723310824 36.7643967256374, 137.041937360854 36.7640518370542, 137.042599778075 36.7638583792931, 137.043864418001 36.7634890315106, 137.044284960904 36.7635206396721, 137.044408582281 36.7637811990247, 137.044639360083 36.7641748738923)) ^^http://www.opengis.net/ont/geosparql#wktLiteral