メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.641860510805 43.9450886071596, 141.640305231343 43.945267496113, 141.640181489187 43.9446097342302, 141.63918766502 43.9435498924222, 141.63928633357 43.9434850221582, 141.63940687539 43.9434082532654, 141.640393875708 43.9427794622628, 141.640978421294 43.9432619435921, 141.641468566281 43.9441598057405, 141.641860510805 43.9450886071596)) ^^http://www.opengis.net/ont/geosparql#wktLiteral