[Gdal-dev] Re: B&W tiffs

[Richard Greenwood]

Christoph Spoerri <cspoerri <at> cavtel.net> writes:

> 
> Hi there,
> one of my peer developers at my office has the following question regarding 
> GDAL:
> 
> I have a 3-band color tiff file. Can I use the gdal library to convert it to 
> one-bit 4 group b&w tiff? If yes, how can I implement it?
> 
> The problem we are facing is to create png and b&w tiffs from ArcMap layout 
> through code (VB). The only other solution (we know if currently) is getting 
> a license for ArcPress, yet this would be fairly expensive and would require 
> additional CPU/memory resources. Does anybody know of any other possible 
> solutions?
> 
> thanks,
> Christoph
> 

I would suggest ImageMagik
    http://www.imagemagick.org/
which is a command line tool. It will loose any geo-referencing information
saved in the tiff header, but you can save it before conversion and restore it
afterwards with gdal_translate.

Regards,
Richard Greenwood
richard.greenwood at gmail.com