メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.330363633429 43.7663924255275, 142.331130994408 43.7666289177805, 142.330919572699 43.766977615921, 142.330515215278 43.7676689151099, 142.329744936516 43.7674452710636, 142.32926927261 43.7673077560069, 142.329082960066 43.7672332390605, 142.329671605435 43.7661772179532, 142.329689784204 43.7661832711137, 142.330363633429 43.7663924255275)) ^^http://www.opengis.net/ont/geosparql#wktLiteral