メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.255780632404 36.6159142027641, 137.256255274012 36.6171748562266, 137.25632896761 36.6173750420516, 137.254026703331 36.6179052547975, 137.253670137068 36.6174030846592, 137.253821658467 36.6169601748964, 137.253663460249 36.6164924992589, 137.253086373806 36.6162934571253, 137.253344272392 36.6161760379772, 137.253739051466 36.6159988109355, 137.254281564489 36.6158274569631, 137.255640438986 36.6155191764389, 137.255780632404 36.6159142027641)) ^^http://www.opengis.net/ont/geosparql#wktLiteral