メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.554146043199 43.1125317729427, 141.555085973796 43.1135507225226, 141.553927025023 43.1140910424083, 141.553218476076 43.1133031885428, 141.553010815563 43.1130722979718, 141.553289491782 43.1129283451976, 141.552724072901 43.1123240050803, 141.552188368687 43.1117329251366, 141.551753933417 43.1112528066043, 141.552952524943 43.1112341016261, 141.554137746091 43.1125227203031, 141.554146043199 43.1125317729427)) ^^http://www.opengis.net/ont/geosparql#wktLiteral