メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.9054992406 43.5106913784203, 141.904630636852 43.510828038076, 141.904645436479 43.5103783831391, 141.904638975435 43.5092253679485, 141.904490773945 43.5080511788151, 141.904488463071 43.508032957724, 141.905191876161 43.5081632150191, 141.905273243629 43.5089927802994, 141.905347591419 43.5098549204479, 141.905387500656 43.5102427138899, 141.9054992406 43.5106913784203)) ^^http://www.opengis.net/ont/geosparql#wktLiteral