メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.91959721915 35.0762284102428, 136.919573085257 35.0765531712159, 136.91832353068 35.0766416324674, 136.918327488 35.0765207871244, 136.917646280275 35.0764355934745, 136.917715899831 35.0759776774482, 136.917791525445 35.0754803343416, 136.918397715475 35.0755620642958, 136.919650481169 35.0757217935961, 136.91959721915 35.0762284102428)) ^^http://www.opengis.net/ont/geosparql#wktLiteral