[Qgis-user] map collars

[Paolo Cavallini]

Chris h ha scritto:

> No apology necessary. Map collars are the white borders around maps that are 
> typically distributed from governmental sources in raster format. In order to 
> stitch or glue charts together you need to remove the collars. (white area)

Oh, that can be easy: for displaying purposes, just set the white value
to null, in the raster properties dialogue. If you want to permanently
set the white to NULL, you can use gdal for this.
All the best.
-- 
Paolo Cavallini: http://www.faunalia.it/pc