メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.944188865006 42.9442074889491, 142.943776199924 42.9444536854922, 142.943703272452 42.9445023031173, 142.943074765525 42.9439087140513, 142.943063449294 42.9438985846008, 142.943135257376 42.9438524353832, 142.943543039801 42.943619142173, 142.944188865006 42.9442074889491)) ^^http://www.opengis.net/ont/geosparql#wktLiteral