メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.420711635591 43.7536344002785, 142.420713876854 43.7536548242615, 142.420773121745 43.754192961784, 142.419486617745 43.7542692764424, 142.419408315051 43.7537208995728, 142.419367841658 43.7532848757347, 142.420669198734 43.7532325374389, 142.420711635591 43.7536344002785)) ^^http://www.opengis.net/ont/geosparql#wktLiteral