U.S. Geological Survey Open-File Report 2006-1170

COLOR SHADED-RELIEF IMAGES - 1:100,000 scale

Color shaded-relief images of the final magnetic data are available
in two formats for each survey area. TIF images are georegistered and
show latitude/longitude tick marks only; they have no extra annotation 
so that they can be co-registered with other overlays.  PDF images have
scales and text for map plot purposes.
 
Color shaded-relief image displays of the magnetic data were created in 
ERMAPPER*, using a sun elevation of 60E and a sun azimuth of 90E(east) for
the Questa-San Luis survey and 270E(west) for the Santa Fe East survey. 
Other displays were created in Oasis Montaj*.  Color scales are shown
on the PDF images, and differ from image to image. The types of image 
files and their uses are described briefly below.

A color-shaded relief image of topography overlain by flight-line locations, 
using a sun azimuth of 45E(northeast) and sun elevation of 45E, is included.

Scale of all images is 1:100,000.


IMAGE TYPE        IMAGE FILES
-------------     ------------------------------------------------------------
TIF  (*.tif)      *rtpcont.tif
 and geotif       
 header (*.tfw)   
                  


IMAGE TYPE        IMAGE FILES			DESCRIPTION
-------------     --------------------    ------------------------------------               
PDF               *fllines100k.pdf		Flight lines atop topography
                  *rdr100k.pdf		Smoothed radar altimeter
                  *rtpcont100k.pdf		Reduced-to-pole magnetic data, 
						  	analytically continued to 100 m. 
						  	above terrain
							
     
EXPLANATION
Portable Document Format file for Adobe* Acrobat readers, annotated
with tick marks, map scale, color scale bar, and brief explanation.
All pdf images have been scaled at 1:100,000.  The flight-line image 
(*fllines.pdf) shows flight-line locations and line numbers.

*Trade names are used for descriptive purposes only.