[GRASS-user] Calculate the average slope by unit

[jopiraux]

Hello,

I would like to calculate the average slope by square kilometer for a giving
area. I have a raster of the considere area with the altitude. So my plan is
to create a grid of square of 1 km² and to calculate for each square the
average slope.

My main problem is that I don"t have any idea how to make it with grass.

Could someone give some tips?

I put the raster i use at the following adress:


http://www.megaupload.com/?d=IWRZC0HH


Thanks

Jon
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