[Qgis-user] Hillshade problem

[José Pedro Santos]

Hi Lester,

Are you using the Terrain analysis toolbox? Or using Sextante algorithms? 

Regards,
Jose Santos

> Date: Mon, 22 Apr 2013 23:45:00 -0700
> From: tech_dev at wildintellect.com
> To: arctica1963 at gmail.com
> CC: qgis-user at lists.osgeo.org
> Subject: Re: [Qgis-user] Hillshade problem
> 
> On 04/22/2013 11:05 PM, Lester Anderson wrote:
> > Hello,
> >
> > I have been trying to use the hillsahde option with some raster data, but I
> > have not managed to get a good result. The azimuth and angle can be changed
> > and that works fine, but the vertical exaggeration does not change - tried
> > values from 0.25 to 10, and all look identical ie grossly over-exaggerated.
> > Not sure what I am doing wrong?
> >
> > Any solutions would be appreciated. I am using v1.8.0 of QGIS.
> >
> > Lester
> >
> 
> Are the pixel values different between those attempts? If so my guess is 
> that you need to change your symbology to not stretch min/max as that 
> might result in an identical looking image since the exaggeration is 
> applied evenly to all pixels. ie. 1-10 will symbolize the same as 1-100 
> if the they are both 10 categories of colors and the exaggeration was x10.
> 
> Enjoy,
> Alex
> 
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