メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.388581906694 44.1829571441155, 142.386233941248 44.1825914253339, 142.386417225612 44.1820011118112, 142.386592607071 44.1814012110359, 142.386777548555 44.1808489886376, 142.386972550889 44.1801490737262, 142.389329581405 44.1805194261719, 142.388952267457 44.1818045291441, 142.388932365352 44.181874130634, 142.388788412424 44.182377594252, 142.388581906694 44.1829571441155)) ^^http://www.opengis.net/ont/geosparql#wktLiteral