メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.275542527934 42.4978708985465, 143.275897470894 42.498379209677, 143.274582622786 42.4988997881052, 143.274244687841 42.4984315539678, 143.274231075122 42.4984126845167, 143.273862288963 42.4978764977425, 143.275152658147 42.497365289969, 143.275181750526 42.4973541980883, 143.275542527934 42.4978708985465)) ^^http://www.opengis.net/ont/geosparql#wktLiteral