メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.787111403326 43.1718732049801, 140.782329583071 43.1752183393376, 140.781637920355 43.1738429882169, 140.781150438906 43.1728939126914, 140.780502406815 43.1714001927658, 140.777508386414 43.1705728144936, 140.77718410697 43.1701409762372, 140.781000416203 43.1681455558922, 140.783503226949 43.1704814785508, 140.784016405661 43.1708029868754, 140.78607633882 43.1714879243254, 140.787111403326 43.1718732049801)) ^^http://www.opengis.net/ont/geosparql#wktLiteral