[GRASS5] displaying and getting only a small portion of a compressed file

[Lee R]

hello! 

I want to design a map viewing software in Palm. As you know the Palm capacity is very small, so I want to compress the map into zip/rar or other formats. But the compressed file is still very big for Palm. So I want to ask, 

is it possible to display a small part, say 1/64 of the map, and getting only that 1/64 data (by the x,y coordinate) from the compressed map file(zip/rar/others), so the Palm can run the software smoothly and fast? 

Thx!

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