メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.410295519514 31.9053487467856, 131.409504762495 31.9058509247882, 131.409292229083 31.9055706064764, 131.409204075293 31.9056324015729, 131.409012695656 31.9055218257533, 131.409017961583 31.905517158666, 131.409328035417 31.9052428456658, 131.409356301952 31.9051155728695, 131.409661593079 31.9051707514102, 131.410086695375 31.9052818442667, 131.410295519514 31.9053487467856)) ^^http://www.opengis.net/ont/geosparql#wktLiteral