メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.380486100543 44.1893409916514, 142.373097496254 44.1881681332963, 142.370645638924 44.1875002336546, 142.371813590027 44.1875205545458, 142.372674484077 44.1874926893794, 142.37346771696 44.1873302342868, 142.374215666396 44.1869954436712, 142.374858788779 44.186660744125, 142.375292203711 44.1862831845452, 142.375516088295 44.1859489377184, 142.378047867205 44.1863630656559, 142.380401214755 44.1867424290538, 142.381239675505 44.1868823531452, 142.380486100543 44.1893409916514)) ^^http://www.opengis.net/ont/geosparql#wktLiteral