호주
GSQOpenData@dnrme.qld.gov.au - 20 CH 2521 20 Chains To An Inch Mine Map Provisional 1968
URL: https://geoscience.data.qld.gov.au/dataset/mr005949 The 20 CH 2521 Mine map was published in 1968, charted in 1971 at 20 Chains to an Inch as part of the 20 CHAIN series to administer permit and permit related spatial information. The map was maintained internally as a provisional office chart and is located within the Ipswich (9442) 1:100 000 map area. The map product is available to all government agencies, industry and the public for reference. Title and Image reference number is 20 CH 2521_0076. Cancelled 1979. Author:Survey Office, Department of Public Lands.