メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.878806792162 35.113896837288, 136.877714969682 35.1139117456357, 136.877727239364 35.1134763710209, 136.878416976365 35.1134625378379, 136.878815326607 35.1134616633087, 136.878806792162 35.113896837288)) ^^http://www.opengis.net/ont/geosparql#wktLiteral