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GSQOpenData@dnrme.qld.gov.au - 20 CH 2526 20 Chains To An Inch Mine Map Provisional 1930
URL: https://geoscience.data.qld.gov.au/dataset/mr005954 The 20 CH 2526 Mine map was published in 1930 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 2526_0083. Tallegalla. Author:Survey Office, Department of Public Lands.