Old Geology and Vegetation Maps for Christmas Island
Authors / CoAuthors
The ANCA directory contains two scanned images, geology.tif and veg.tif. The geology map contains the following information: Base map compiled from topographic base sheets prepared by Australian Aerial Mapping Pty. Ltd. and supplied by The British Phosphate Commissioners. Geology and compilation by J. Barrie 1965-66 Drawn by J. Kopros Bureau of Mineral Resources, Geology and Geophysics CHRISTMAS ISLAND SURVEY 1965-66. To accompany Record 1967/37. The vegetation map contains the following message: Vegetation map - Accompanies Mitchells 1985 Report. ONLY COPY!! See File 80/13 for Report. It is based on J Barries geology map.
Australian and New Zealand Standard Research Classification (ANZSRC)
Australian Government Security ClassificationSystem
Classification - unclassified
Creative Commons Attribution 4.0 International Licence
Access - restricted
Use - license
These two maps were obtained as dyelines from ANCA, scanned then registered and rectified for inclusion with the GIS. Registration of the geology map was accomplished using a formula derived empirically on the island, extended for conversion from Imperial Island Grid (lines visible on scan) to CIG85. As the vegetation map did not contain visible grid lines, the formula could not be used, so registration was dependant on scarce and imprecise common points between the vegetation map and the AUSLIG 1:25000 data in the GIS. In September 2003 the TIFF images were converted to the MGA(GDA94) projection using an x y shift (550015 = x, 8780001 = y) on the CIG85 projection.