メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.354116484468 43.0932770991136, 141.353921113743 43.0940786482259, 141.353363159927 43.0940007852961, 141.35282951944 43.0939337298481, 141.352349907185 43.0938734258289, 141.352652706575 43.0926496959636, 141.35319868164 43.0927321105557, 141.354234538882 43.092854788162, 141.354116484468 43.0932770991136)) ^^http://www.opengis.net/ont/geosparql#wktLiteral