メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.753881354473 31.7420480397622, 130.752804583431 31.7422335396494, 130.75280219798 31.7420221382348, 130.752795298233 31.7418497657962, 130.752865978894 31.7418422927368, 130.752992985835 31.7416990699394, 130.753803157245 31.7415546288644, 130.753881354473 31.7420480397622)) ^^http://www.opengis.net/ont/geosparql#wktLiteral