メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.183194141872 43.0480781566853, 143.183438939562 43.0487216507513, 143.183271006654 43.0487520680607, 143.183248534186 43.0487561197264, 143.182019120268 43.0489951410896, 143.181778216932 43.048342047407, 143.18159471902 43.0478444780774, 143.183000685615 43.0475696997213, 143.183194141872 43.0480781566853)) ^^http://www.opengis.net/ont/geosparql#wktLiteral