メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.310288196361 43.0688624798278, 141.310146673998 43.068946134257, 141.310045227581 43.0690060650487, 141.309673515279 43.0692256013529, 141.309091693604 43.0687446919916, 141.30828820202 43.0680818438973, 141.308889402828 43.0677532903983, 141.309564486057 43.0673789247212, 141.310058171619 43.0671112306092, 141.310146345449 43.0670659596077, 141.311093032093 43.0678875068389, 141.311418392501 43.0681650218493, 141.310288196361 43.0688624798278)) ^^http://www.opengis.net/ont/geosparql#wktLiteral