メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.948847785297 35.8914279801028, 139.948012529807 35.892209016025, 139.946561866103 35.8916517084959, 139.945541132153 35.8912553450951, 139.944819657751 35.8909803213995, 139.94517143979 35.8906610950824, 139.945602470933 35.8899742516401, 139.946621549359 35.890380081118, 139.948847785297 35.8914279801028)) ^^http://www.opengis.net/ont/geosparql#wktLiteral