メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.350343733382 43.0738415394843, 141.350189586426 43.0744170272001, 141.350033215011 43.0749936934571, 141.349086074913 43.0748521543271, 141.348918914561 43.074827172923, 141.348500054867 43.074764576215, 141.348636855661 43.0741954954171, 141.348779314174 43.0736199179722, 141.350343733382 43.0738415394843)) ^^http://www.opengis.net/ont/geosparql#wktLiteral