メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.035633855633 42.9149081003298, 143.036390741794 42.9149531313404, 143.036192399396 42.9163801228277, 143.035425741194 42.9163203870856, 143.035447717836 42.9161710623381, 143.03440030217 42.9160918615868, 143.03441462301 42.9159799353821, 143.034562020168 42.9148294192726, 143.035633855633 42.9149081003298)) ^^http://www.opengis.net/ont/geosparql#wktLiteral