U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Description of digital aeromagnetic data collected north and west of Albuquerque, New Mexico by U. S. Geological Survey (MS 964, Federal Center, Denver, CO 80225), with an Appendix by SIAL Geosciences, Inc. (1400 boul. Gouin Ouest, Montreal, Quebec, Canada H3M 3B1) Open-File Report 97-286 This report is preliminary and has not been reviewed for conformity with U. S. Geological Survey editorial standards. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U. S. Geological Survey These data have been approved for release and publication by the Director of the USGS. Although these data have been subjected to rigorous review and are substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, they are released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Digital files of the data (constructed for display purposes only) can be downloaded via 'anonymous ftp' from a USGS system named greenwood.cr.usgs.gov (136.177.21.122). The files are located in a directory named /pub/open-file-reports/ofr-97-0286 and are described in an ASCII file named readme.txt. A web browser can access these files at http://rmmcweb.cr.usgs.gov/public/mrgb/mrgbhome.html. The original digital geophysical data (flight-line data and grids constructed by the contractor) can be obtained from the National Geophysical Data Center, Boulder, Colorado (http://www.ngdc.noaa.gov/seg/potfld/ad_sys.html). The data contact is: V. J. S. ("Tien") Grauch 303-236-1393 tien@usgs.gov U. S. Geological Survey Box 25046, MS 964 Federal Center Denver, CO 80225 DESCRIPTIONS OF FILES CONTAINED IN THE ANONYMOUS FTP AREA FILE NAME FILE TYPE DESCRIPTION -----grid files----- rrsmag.e00 Arc interchange ArcGrid of the Rio Rancho data file (50-m grid interval) in interchange format for import to ArcInfo systems. awsmag.e00 Arc interchange ArcGrid of the Albuquerque west data file (50-m grid interval) in interchange format for import to ArcInfo systems. ---image files---- rrsmag.tif tagged image file Page size color shaded-relief image format of the USGS Rio Rancho magnetic grid. awsmag.tif tagged image file Page size color shaded-relief image format of the USGS Albuquerque West magnetic grid. rrsmag.eps encapsulated 1:100,000 scale color shaded- postscript file relief image of the USGS Rio Rancho magnetic grid. awsmag.eps encapsulated 1:100,000 scale color shaded- postscript file relief image of the USGS Albuquerque west magnetic grid. rrsmag.pdf portable document Color shaded-relief image of the file (PDF) format USGS Rio Rancho magnetic grid at 100 dpi resolution. awsmag.pdf portable document Color shaded-relief image of the file (PDF) format USGS Albuquerque west magnetic grid at 100 dpi resolution. figure1.eps encapsulated Black and white image of figure 1 postscript file of the report (survey index map). figure1.pdf portable document Black and white image of figure 1 file (PDF) format of the report (survey index map).. -----text-------- readme.txt ASCII text This file text.txt ASCII text File that contains text of the report without figure or Appendix A. Appendix A is only available as a paper copy through Open-File Services, USGS, Denver, CO