U.S. Geological Survey Open-File Report 2009-1089

COLOR SHADED-RELIEF IMAGES - 

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.  Page-sized PDF 
images have scales and text for map plot purposes.


IMAGE TYPE        IMAGE FILES                DESCRIPTION
-------------     ------------------------------------------------------------
tif (*.tif)       gsd_rtpcont_nad27.tif       Great Sand Dunes (gsd) or
 and geotif       gsd_rtpcont_wgs84.tif        Poncha Springs (ps) area;
 header (*.tfw)   ps_rtpcont_nad27.tif         reduced-to-pole magnetic data;
                  ps_rtpcont_wgs84.tif         using NAD27 or WGS84 datum. 
                  
IMAGE TYPE        IMAGE FILES			 DESCRIPTION
-------------     ------------------------------------------------------------               
PDF               gsd_rtpcont.pdf		   Reduced-to-pole magnetic
                  ps_rtpcont.pdf		          data, analytically continued 
                               		          to 100 m. above terrain,
                                                    NAD27 datum. 
					        
EXPLANATION
Portable Document Format file for Adobe* Acrobat readers, annotated
with tick marks, map scale, color scale bar, and brief explanation.

*Trade names are used for descriptive purposes only.