	I have some topo maps (in GeoTIFF format from Teale Data
Center).  I want to crop the 'collars' (the white space around the map
itself) then join adjacent maps at their boundaries to create one new
map.  I have looked at GRASS, read docs, and followed tutorials for
hours and not figured out how to do this.  I hope this indicates great
obtuseness on my part.  Would some kind soul point me in the right
direction?
	Thanks.

russell bell



