メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.328535077508 43.0486663846198, 141.327751872346 43.0486173836223, 141.327868562574 43.0481192661083, 141.327961564627 43.0477107686108, 141.328026333566 43.0474585265292, 141.328686338796 43.0475049858476, 141.328628575908 43.0479299438723, 141.328555436869 43.0485170989486, 141.328535077508 43.0486663846198)) ^^http://www.opengis.net/ont/geosparql#wktLiteral