[GRASSLIST:1227] registration of maps

[Uttam Kumar]

Dear Sir,
         I imported a scanned map through r.in.tiff.sh (24 bit) format. Then 
I used
1.)  i.group
2.)  i.target
3.)  i.points
4.)  i.rectify
to register the map.

The output which I received in the other LOCATION (which was given 
Projection and Standard coordinate system (LAT-LONG)); was an image which 
was perhaps registered. and I could see the lat-long values by using 
d.where.

The only problem I see is that the image got distorted as if pixels were 
stretched. Some people called that "check board effect" in image processing 
and say that it occurs because the image size is much smaller than the 
X-viewer size.

How can I obtain a clear picture without "check board effect" or reduce the 
size of the GRASS X VIEWERS. Please Help.

thanks.

uttam.

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