メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.599722355236 43.2906346639871, 144.598357607839 43.2925240385551, 144.59831456128 43.2924562169766, 144.596426456308 43.2896447803471, 144.597288669224 43.2889501401666, 144.598430459881 43.2897713421949, 144.599609445061 43.2905625830636, 144.599722355236 43.2906346639871)) ^^http://www.opengis.net/ont/geosparql#wktLiteral