メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.384929484837 43.1493239048346, 141.384990280079 43.1496516187287, 141.382990330911 43.1498305923152, 141.382516632604 43.1498690455423, 141.382454944824 43.1495306342384, 141.382275586206 43.1484179658411, 141.382742633131 43.1483872690635, 141.383214681077 43.1483425430227, 141.383668705609 43.1483021080799, 141.384261945281 43.1482591455008, 141.384756569624 43.1482141666909, 141.384929484837 43.1493239048346)) ^^http://www.opengis.net/ont/geosparql#wktLiteral