メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.857473712601 36.4675568535168, 136.857429607152 36.4672348364106, 136.857456091734 36.4670781759286, 136.857832352455 36.4667866082832, 136.858220653363 36.4667249499267, 136.858711586904 36.466882911996, 136.858878771889 36.4671236444939, 136.85896412312 36.4673939832629, 136.858695407066 36.4677082580875, 136.858306814568 36.4678430711133, 136.857880251347 36.4677688497281, 136.857473712601 36.4675568535168)) ^^http://www.opengis.net/ont/geosparql#wktLiteral