メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.409434919281 43.1288875375073, 141.410540686277 43.1291829441674, 141.409887703247 43.1305533642612, 141.411044534642 43.1309016816732, 141.410950884936 43.1310370791068, 141.410436679039 43.131780754859, 141.409943810533 43.1325010249443, 141.409072111115 43.1322327332979, 141.409264731348 43.1318268741271, 141.408231849439 43.1313460341271, 141.407286105623 43.1308907929781, 141.407503323552 43.1304493211684, 141.407536810546 43.1303812789333, 141.407915724545 43.1296112271305, 141.408400522634 43.1286116294633, 141.409434919281 43.1288875375073)) ^^http://www.opengis.net/ont/geosparql#wktLiteral