メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.741320936136 43.1865125805901, 141.741092779844 43.1865230319896, 141.74066558294 43.1865562992943, 141.740187397924 43.1866185940236, 141.739535460468 43.186725052295, 141.738888659389 43.1868549504342, 141.738362074159 43.1869638621743, 141.738013791128 43.1870301033991, 141.735106694288 43.1854898919692, 141.735287919835 43.1854196023864, 141.737124891185 43.184706119362, 141.737567230491 43.1845269991234, 141.741376004975 43.1864549444621, 141.741320936136 43.1865125805901)) ^^http://www.opengis.net/ont/geosparql#wktLiteral