Importing and rectification of topographic maps

Laxmi Prasad Musunur mlp at
Wed Nov 10 08:38:56 EST 1993


If you haven't already, try changing the resolution in your UTM (target)
location before starting i.rectify
Laxmi P. Musunur (LP) School of Forestry, Auburn University, 
AUBURN AL 36849	E-mail:  mlp at

> Date: Tue, 9 Nov 1993 17:55:22 -0800 (PST)
> From: Melissa Cowoski <cowoski at pangea.Stanford.EDU>
> Subject: Re:Importing and rectification of topographic maps
> I have imported a topographic map into an xy location.  I now want to
> rectify this map to UTM coordinates.  When I display the topographic map
> in the xy location the map looks fine, however after I rectify the topo I
> lose almost all of the resolution and contours.  I know the problem is
> related to the nearest neighbor interpolation after the rotation and the
> fact that the contours are defined by very few pixels. I want to use the
> topographic map as a base map.  Does anyone have any suggestions on how I
> could go about doing thi

More information about the grass-user mailing list