メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.324820970774 43.1212979199218, 141.325118647251 43.1215748138297, 141.325823124144 43.1222846928158, 141.325454579787 43.1224859405984, 141.325089859804 43.1226817323799, 141.324740209839 43.1228776449392, 141.324320382871 43.1231047058355, 141.323641591521 43.1223983315311, 141.3229252781 43.1216728020904, 141.323316276618 43.1214598594879, 141.323691203879 43.1212555754894, 141.323876875072 43.1211544739421, 141.324045508034 43.1210626571359, 141.324400682061 43.1208691118428, 141.324820970774 43.1212979199218)) ^^http://www.opengis.net/ont/geosparql#wktLiteral