メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.935070473518 42.9462202383857, 142.934787432709 42.9459747866419, 142.934754690929 42.945944669447, 142.93465796818 42.9458556456789, 142.934420124966 42.9456367887375, 142.933673395835 42.9449721152373, 142.933745516146 42.9449277280821, 142.934820268336 42.9442973324082, 142.935152283329 42.9445958027747, 142.935755802346 42.9451351496128, 142.93603824904 42.9453875659005, 142.936223384438 42.9455495545711, 142.935095683703 42.9462057405611, 142.935070473518 42.9462202383857)) ^^http://www.opengis.net/ont/geosparql#wktLiteral