メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.229690174101 37.826740783702, 139.226895133767 37.8268135575643, 139.226857645632 37.8258654914102, 139.228608360855 37.8258211512437, 139.228578717587 37.8249511710436, 139.229169296688 37.8249363904832, 139.229287889223 37.8248407675749, 139.229449109249 37.8247840176018, 139.229444271081 37.8242931452571, 139.230302075453 37.8242766992513, 139.230356817421 37.825548173098, 139.231263787844 37.8255257836392, 139.23131352185 37.8267149316376, 139.230405022546 37.8267321194712, 139.229690174101 37.826740783702)) ^^http://www.opengis.net/ont/geosparql#wktLiteral