メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.274231075122 42.4984126845167, 143.274244687841 42.4984315539678, 143.274582622786 42.4988997881052, 143.273647950164 42.4992806438285, 143.273330155176 42.4993303270011, 143.273012913196 42.4988481180695, 143.272661482162 42.4983615704531, 143.273862288963 42.4978764977425, 143.274231075122 42.4984126845167)) ^^http://www.opengis.net/ont/geosparql#wktLiteral