メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.765024760847 43.1860797057572, 141.765123895106 43.1863475834922, 141.764239623835 43.1872244760705, 141.76374880871 43.1877738998314, 141.763689102376 43.1877462187496, 141.763465238571 43.1876273965735, 141.762961514122 43.1873675709582, 141.762793572937 43.1872873150509, 141.763464839312 43.1865682577814, 141.763620383589 43.1866483897902, 141.763761780365 43.1864940583335, 141.763869612684 43.1863669427885, 141.764800701061 43.1853721714684, 141.765024760847 43.1860797057572)) ^^http://www.opengis.net/ont/geosparql#wktLiteral