メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.115744132812 36.6989504221719, 137.1151009144 36.6990209042353, 137.114925615663 36.6983755543499, 137.114792289403 36.6980132552885, 137.114595866226 36.6974131684308, 137.114687301555 36.6973169618952, 137.115906776042 36.6973939485038, 137.115943277967 36.6976845273952, 137.116099110324 36.6989250855691, 137.115744132812 36.6989504221719)) ^^http://www.opengis.net/ont/geosparql#wktLiteral