メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.895207506089 43.0109352355661, 142.894649586991 43.0105993124835, 142.895509404961 43.0098711314372, 142.895684692627 43.0097209745287, 142.895727661495 43.009747317093, 142.895789056201 43.0097850193305, 142.896210318045 43.0100435708377, 142.89525986835 43.0108883824676, 142.895207506089 43.0109352355661)) ^^http://www.opengis.net/ont/geosparql#wktLiteral