OF 2007–1042: Western Afghanistan Thorium Content
Thorium content and related data were digitized from radiometric and survey route location maps of western Afghanistan published in 1976. The thorium content data were digitized along contour lines from 33 maps in a series entitled "Map of Thorium Contents of Afghanistan (Western Area)," compiled by V. N. Kirsanov and R. S. Derzhimanov. The survey route location data were digitized along flight-lines located on 33 maps in a series entitled "Survey Routes Location and Contours of Flight Equal Altitudes, Western Area of Afghanistan," compiled by Z. A. Alpatova, V. G. Kurnosov, and F. A. Grebneva.
All grids are presented in Geosoft binary grid format, with two files describing each of the grids (suffixes .grd and .gi). All databases are presented in Geosoft database format (suffix .gdb). Either of these formats can be converted to other formats using the free conversion software offered by this company at http://www.geosoft.com/.
All databases, maps, grids, and xyz files in this report use the following projection specifications:
This web site makes available to users the data products mentioned above for these surveys. To view this directory, click on the link below. To view the README file ("readme_thorium_datafiles.pdf") describing the aeromagnetic data product files, click on the README line following.
For more information about this report contact: Pat Hill
Posted March 2007