メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.779251946642 35.4121141683709, 136.777661330353 35.4121734843776, 136.776465383906 35.4122210201388, 136.776435704645 35.41178372482, 136.777632544961 35.4117546774917, 136.779121693472 35.4116952842785, 136.779251946642 35.4121141683709)) ^^http://www.opengis.net/ont/geosparql#wktLiteral