Zooming on images

[ddnebert]

I have now four nice TIF images that I would like to use as backdrop to
other
data. The files are as follows with wld files that let them render fine
individually
at full extent.  If I try to set another extent in the GET request, I
still see the
whole world, rather than a zoomed in region.

shdrela.tif 640 x 320 TIF
shdrelb 2160 x 1080 TIF
shdrelc 4800 x 2400 TIF
shdreld 10800 x 5400 TIF

So I have two problems:

1. How do I make the registration correct?  I calculated the TFW files
as attached.

2. Once I can view one of the files, I'd like to set them up as a
cascade
of a single theme, broken by MINSCALE and MAXSCALE values.
Should the following work?

LAYER
  NAME shdrelief
  TYPE RASTER
  STATUS ON
  DATA shdrela.tif
  MINSCALE 5000000
  OFFSITE 0
END

LAYER
  NAME shdrelief
  TYPE RASTER
  STATUS ON
  DATA shdrelb.tif
  MINSCALE 3000000
  MAXSCALE 5000000
  OFFSITE 0
END

LAYER
  NAME shdrelief
  TYPE RASTER
  STATUS ON
  DATA shdrelc.tif
  MINSCALE 1000000
  MAXSCALE 3000000
  OFFSITE 0
END

LAYER
  NAME shdrelief
  TYPE RASTER
  STATUS ON
  DATA shdreld.tif
  MAXSCALE 1000000
  OFFSITE 0
END

-------------- next part --------------
0.5625
0.00000000000000 
0.00000000000000 
-0.5625
-179.4375
89.4375
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0.1666667
0.00000000000000 
0.00000000000000 
-0.1666667
-179.833333
89.833333
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0.075
0.00000000000000 
0.00000000000000 
-0.075
-179.925
89.925
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0.03333333
0.00000000000000 
0.00000000000000 
-0.03333333
-179.9666667
89.9666667