メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.650505638306 43.9368778462907, 141.650627523435 43.9373664906706, 141.650633511168 43.9373903915889, 141.65073224535 43.9378686069566, 141.650871578605 43.9384563658451, 141.650332729172 43.9385217705462, 141.649851725899 43.938152527994, 141.649388222592 43.9378000328387, 141.649245343621 43.9376913643589, 141.648447068328 43.9370811746583, 141.648887994917 43.9367713723692, 141.649345429096 43.9364258536939, 141.649453245251 43.9364213069033, 141.649555075114 43.9364170146372, 141.650392406195 43.9363127094999, 141.650505638306 43.9368778462907)) ^^http://www.opengis.net/ont/geosparql#wktLiteral