メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.764800701061 43.1853721714684, 141.763869612684 43.1863669427885, 141.763761780365 43.1864940583335, 141.763620383589 43.1866483897902, 141.763464839312 43.1865682577814, 141.762793572937 43.1872873150509, 141.762339477703 43.1870539297436, 141.761856786391 43.1868093795531, 141.762561410348 43.1860658548177, 141.762920766512 43.1856653922222, 141.763817564092 43.1847232274652, 141.764729914826 43.1851778360596, 141.764800701061 43.1853721714684)) ^^http://www.opengis.net/ont/geosparql#wktLiteral