メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.355378608845 43.0879544072517, 141.355225008464 43.0886640138022, 141.353657547665 43.088453909091, 141.353827667466 43.0877444341336, 141.354005731928 43.0870492264454, 141.355558597045 43.0872644179612, 141.355378608845 43.0879544072517)) ^^http://www.opengis.net/ont/geosparql#wktLiteral