メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.047874687257 35.1829402417404, 137.048033279961 35.1833640665771, 137.048044903442 35.1833980436042, 137.047120519235 35.1832389881807, 137.047114831252 35.1832380043741, 137.047120056252 35.1832188447203, 137.047121701907 35.1832128015101, 137.047125558011 35.1831873729368, 137.047874687257 35.1829402417404)) ^^http://www.opengis.net/ont/geosparql#wktLiteral