メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.341957585845 43.0974774610955, 141.342726771134 43.0975894841831, 141.342643723351 43.0979556583357, 141.342587454164 43.0981396131254, 141.342535634335 43.0983862655493, 141.342456515927 43.098668146712, 141.341671350191 43.0985520561766, 141.341573952499 43.0985398404377, 141.341299393292 43.0985054043073, 141.340869738175 43.0984515137381, 141.34097755099 43.0980404567677, 141.3410391964 43.097856615831, 141.341079638865 43.0976529142589, 141.341145567609 43.0973611538913, 141.341957585845 43.0974774610955)) ^^http://www.opengis.net/ont/geosparql#wktLiteral