[ gpsdrive ] NOAA charts

[Chris h]

Greets:

Perhaps if Hamish has the time he could answere the following question. 

I would like to remove the white collars on the set of NOAA charts that I have 
for the Great Lakes and East Coast to allow them to be rendered in gpsdrive 
without the annoying white boarders. 

Ive install the lastest grass stable version and in the coming week will setup 
a dedicated work station to process charts. Check the grass archive and there 
are only two entries on this subject which I found strange. 

So was wondering is their a way to use grass and script it to process charts 
in a specific folder to remove the white collars but retain the georeferenced 
data. The next step would be to process the same folder allowing the maps to 
be tiled and then the final step is to import them into gpsdrive 

Best regards and thanks for any info. If this is a pipe dream or not needed 
feel free to correct me. Personally I think it would be rather cool to stitch 
all these charts together concurrently display them on a local mapserver 
variant as well as that makes a nice planning tool. 

Its nothing new and has been done, but unfortunately its all commercial. 
http://demo.geogarage.com/noaa/

So step one is to remove the collars. Any suggestions or scripts would be very 
much appreciated. 

-- 
/ch