メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.326924976392 43.7652935643828, 142.327458103813 43.7654640678036, 142.327964422546 43.7656197828198, 142.327313383624 43.7667038253614, 142.326813944868 43.7665436195554, 142.326303990415 43.7663924898913, 142.326287512508 43.7663876132978, 142.325772667321 43.766238576337, 142.326099344787 43.7656745919626, 142.326405726479 43.7651417372838, 142.326416925992 43.7651449998988, 142.326924976392 43.7652935643828)) ^^http://www.opengis.net/ont/geosparql#wktLiteral