メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.348943723398 43.0600871405797, 141.34878207891 43.0607571638361, 141.348039765753 43.0606744418205, 141.347969465692 43.0608964811124, 141.347612802636 43.0608544235922, 141.347655819828 43.0606614975316, 141.347662059821 43.0606022582828, 141.347227793194 43.0605478430411, 141.34737913645 43.0598881491875, 141.347617030285 43.0589443730692, 141.349191925469 43.0591647521829, 141.348943723398 43.0600871405797)) ^^http://www.opengis.net/ont/geosparql#wktLiteral