メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.353276011712 43.1540092381763, 141.353370817209 43.1543647192744, 141.353460492422 43.1547164324479, 141.353573029533 43.1551800062886, 141.351705903546 43.1554487090165, 141.351659637173 43.1552361650573, 141.351589164065 43.1549252521466, 141.351558485501 43.1547897700982, 141.351454493372 43.1543340691064, 141.351335784958 43.1538141842786, 141.353196938114 43.1535895310068, 141.353276011712 43.1540092381763)) ^^http://www.opengis.net/ont/geosparql#wktLiteral