Usage:
  map2tga <parameter file>

or:
  map2tga <input file> <output file> [-sig <int>] [-pal <int>]
    [-xsz <int>] [-bar] [-log] [-asinh] [-lon <float>] [-lat <float>]
    [-mul <float>] [-add <float>] [-min <float>] [-max <float>]
    [-res <float>] [-title <string>] [-flippal] [-gnomonic]
    [-interpol] [-equalize] [-viewer <viewer>]


Parameters read by map2tga:

infile (string):
  input file containing the Healpix map

outfile (string):
  output TGA file

sig (integer, default=1):
  column number of the requested Healpix map

pal (integer, default=4):
  number of the color palette

flippal (bool, default=false):
  whether the palette should be flipped

xsz (integer, default=1024):
  number of image pixels in x direction

bar (logical, default=false):
  whether a color bar should be added to the image

log (logical, default=false):
  whether the logarithm of the map values should be displayed

equalize (logical, default=false):
  whether histogram equalisation should be performed

asinh (logical, default=false):
  whether the hyperbolic arcsine of the map values should be displayed

lon (double, default=0):
  the longitude (in degrees) of the image center

lat (double, default=0):
  the latitude (in degrees) of the image center

mul (double, default=1):
  scale factor applied to the data

add (double, default=0):
  offset added to the data (before multiplication)

min (double, optional):
  if specified, this value is used as minimum of the color scale

max (double, optional):
  if specified, this value is used as maximum of the color scale

res (double, default=1):
  only for gnomonic projection: the size (in arcmin) of an image pixel

title (string, optional):
  if specified, this value is used as the image title

viewer (string, optional):
  if specified, this executable is used to show the resulting image

pro (string, default="mollw"):
  if this is equal to "gno", gnomonic projection is used, else Mollweide

interpol (bool, default=false):
  false: no interpolation
  true : bilinear interpolation