メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.251118587875 43.1392571700601, 141.250921869957 43.1395836795416, 141.250885425923 43.1395569896168, 141.249640794628 43.1386543715561, 141.249828556613 43.1385299093309, 141.250038360311 43.1386795000736, 141.25038189254 43.1389206279276, 141.250635375741 43.1390537192236, 141.251005054999 43.1392168673012, 141.251046209012 43.1392315030673, 141.251118587875 43.1392571700601)) ^^http://www.opengis.net/ont/geosparql#wktLiteral