メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.826237066245 35.514733848804, 137.825733134849 35.5149999069475, 137.825177398526 35.5152717487233, 137.824805669905 35.5148141225837, 137.825853629312 35.514289554514, 137.826025507766 35.514525154639, 137.826066536463 35.5145063796149, 137.826237066245 35.514733848804)) ^^http://www.opengis.net/ont/geosparql#wktLiteral