メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.404677827083 43.7922060098042, 142.405707651201 43.7928576875368, 142.405723696804 43.7928678273555, 142.40457814564 43.793826312419, 142.404357706962 43.7936854009519, 142.403891631919 43.7933808434785, 142.403546818037 43.7931638144261, 142.40247719553 43.7925256362566, 142.403634548128 43.7915422794108, 142.403645910822 43.791549402259, 142.404677827083 43.7922060098042)) ^^http://www.opengis.net/ont/geosparql#wktLiteral