メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.945629425661 37.7926956582677, 140.94241345173 37.7926257104597, 140.942450647984 37.7914646040106, 140.944264037277 37.7908713074991, 140.945295903389 37.790546789293, 140.945656101623 37.7904335820082, 140.945672099359 37.791299670851, 140.945658952263 37.7918250568206, 140.945629425661 37.7926956582677)) ^^http://www.opengis.net/ont/geosparql#wktLiteral