Maps from 
McEwen, A. S. 1990. Global color and albedo variations on Triton. 
Geophysical Research Letters 17, 1765-1768

Files provided by Will Grundy, 2007 June 24
McEwen_1.fits   McEwen_2.fits   McEwen_3.fits   McEwen_4.fits   McEwen_5.fits   McEwen_6.fits   
McEwen_unmapped.gif
McEwen_1.gif    McEwen_map.xcf  McEwen_map.jpg  

Original digital version (in sinusoidal equal area) was emailed
from Alfred McEwen to Will Grundy, who converted it into a
equirectangular projection.  Will subsequently had to reproduce
the digital version by scanning a slide he made for DPS, 
here as McEwen_map.jpg.  In this color slide, 
     1 = Red          (part of equatorial band)
     2 = Dark green   (part of south polar cap)
     3 = Yellow       (part of south polar cap)
     4 = Purple       (part of equatorial band)
     5 = Medium green (part of south polar cap)
     6 = Light green. (part of equatorial band)
unseen = black

The left edge of the map is at 0 longitude (sub-Neptune) with East
Longitude increasing to the right.  Note that East Longitude is what
was used in Stansberry et al. 1992, and Grundy and Young 2004
(presumably McEwen et al. 1990 too, since McEwen made the maps
for Stansberry et al 1992).

McEwen+*.fits are simple 551 x 278 byte FITS files marking the 
extent of each geologic unit, with 0 for not part of that
unit and 255 if it is.



