メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.117540678129 36.6988420516604, 137.116099110324 36.6989250855691, 137.115943277967 36.6976845273952, 137.115906776042 36.6973939485038, 137.118894019579 36.6975026936911, 137.118914857982 36.6979215498576, 137.118965643576 36.6985688148627, 137.118534136489 36.698581103228, 137.118538288248 36.6987845799309, 137.117540678129 36.6988420516604)) ^^http://www.opengis.net/ont/geosparql#wktLiteral