メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.306062898223 42.9343743715602, 143.305416356257 42.9392127442442, 143.303378525294 42.9391140437135, 143.30338270211 42.9390670959666, 143.30360152705 42.9366134014876, 143.303775372708 42.9349303598441, 143.303861767531 42.9342039699907, 143.303909981063 42.9333773598035, 143.304066625074 42.9324264627225, 143.305242911599 42.9329178641349, 143.306223789883 42.9333210324123, 143.306062898223 42.9343743715602)) ^^http://www.opengis.net/ont/geosparql#wktLiteral