メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.441337401415 43.7713332670682, 142.441396076797 43.7719053261904, 142.441439739151 43.7722452063494, 142.441457977548 43.772454190058, 142.441566873922 43.7734388493484, 142.441572673001 43.7734990522684, 142.44015982286 43.7735608251715, 142.4401430906 43.7733476899243, 142.438027030502 43.7734461216084, 142.438003099346 43.7731831206679, 142.437940604741 43.772636626903, 142.437891405742 43.7720897072366, 142.437829495263 43.7715277589365, 142.437827358129 43.7715079498167, 142.437761360714 43.7708961133053, 142.439897152252 43.7707746639204, 142.44128997757 43.7706986219087, 142.441337401415 43.7713332670682)) ^^http://www.opengis.net/ont/geosparql#wktLiteral