[Qgis-user] GDALdem, when?

[sergio sevillano]

El 01/10/2010, a las 01:39, John C. Tull escribió:

> Hi Sergio,
> 
> I have not used "DEM relief shader", but there is also the "Shaded Relief" plugin.

is the same plugin, it has both names. one in the menus other in the plugin administrator.
(maybe is a translation thing)

> Additionally, a program called SimpleDEMViewer is available on OS X:
> http://www.macupdate.com/info.php/id/20636/simpledemviewer
> 
> For using gdaldem from the Terminal.app, here are some sample commands that I use to generate a color hillshade from gtopo dems:
> gdaldem hillshade gtopo30.tif -z 10 temp.tif
> composite -blend 50 temp.tif temp.tif temp2.tif
> gdal_translate -co compress=lzw temp2.tif western_colorshade.tif
> rm temp*
> 
> This assumes you have a file called 'scale.txt' in the same directory in which you are working. My scale.txt file has the following lines, but you can adjust based on the highest point in your region of interest (heights are in meters here):
> 3500 255 255 255″
> 2500 235 220 175″
> 1500 190 185 135″
> 700 240 250 150″
> 0 50 180 50″
> -32768 200 230 255″
> 
> Regards,
> John
> 

thanks for the tips john
ill try your two suggestions


it has been talked before in the list
but there is also SEXTANTE
a deeper raster analisys library...

http://www.sextantegis.com

sergio
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