メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.818942294406 34.7391049606643, 135.818657574992 34.7389841006752, 135.818262783448 34.7388154652258, 135.818267172084 34.7384531786096, 135.81886119058 34.7384065948319, 135.818931119494 34.7388454786176, 135.818895929016 34.7388588082044, 135.818941641781 34.7389838197005, 135.818942294406 34.7391049606643)) ^^http://www.opengis.net/ont/geosparql#wktLiteral