メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.96688126721 38.5749680537768, 140.967048469491 38.5754650563446, 140.967218656914 38.5760187853632, 140.965504345757 38.5763595608815, 140.965112808802 38.5764451660949, 140.964762872738 38.5753648853918, 140.964606658451 38.5748488653319, 140.965017594874 38.5747659128503, 140.966722745895 38.5744538680309, 140.96688126721 38.5749680537768)) ^^http://www.opengis.net/ont/geosparql#wktLiteral