[GRASS-user] shaded relief of srtm tiles

[Hamish]

thorsten wrote:
> hello list,
> 
> i try to use r.shaded.relief  on srtm tiles imported with r.in.srtm.
> the results look nice, but adjacent tiles have a different average 
> brightness.
> I used the same parameters (altitude=44 azimuth=270 units=meters) for 
> both maps and tried with grass versions 6.02 and 6.20
> That's how it looks like for the original srtm tiles N42W005.hgt.zip
> and N42W004.hgt.zip:
> http://www.flickr.com/photos/h2guide/328146671/
> 
> What am i doing wrong? (Or what am i supposed to do in order to produce 
> seamless shaded reliefs?)


try setting an absolute color table with r.colors,


or merge the two tiles first:

g.region rast=tile1,tile2
r.patch in=tile1,tile2 out=tile_merge


Hamish