メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.323436230313 43.0510041650903, 141.323886604218 43.0511101405507, 141.324309922627 43.0511724329082, 141.324204266984 43.0515976329693, 141.324037901955 43.0522586489886, 141.323718286045 43.0522127383987, 141.323598478372 43.0521954517616, 141.323273695479 43.052148794129, 141.322701347893 43.052067004635, 141.322823318814 43.0515527604419, 141.322895882486 43.0512495969546, 141.32290979883 43.0511916170308, 141.322980792579 43.050897020684, 141.323436230313 43.0510041650903)) ^^http://www.opengis.net/ont/geosparql#wktLiteral