メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.240092138029 37.0374980905084, 138.239173738749 37.0379083621868, 138.237976947989 37.0384426299003, 138.237280019292 37.0374585231216, 138.236650690131 37.0365429925691, 138.237689662483 37.0360751355849, 138.238743917746 37.0356159618506, 138.239628246762 37.0368391443409, 138.240092138029 37.0374980905084)) ^^http://www.opengis.net/ont/geosparql#wktLiteral