[gdal-dev] getting height from Geotiff DEM

[Nicolas Cadieux]

Sorry,

This was the correct answer but for the wrong user list....

Nicolas Cadieux M.Sc.
Les Entreprises Archéotec inc. 
8548, rue Saint-Denis Montréal H2P 2H2
Téléphone: 514.381.5112  Fax: 514.381.4995
www.archeotec.ca

On Jun 6, 2015 10:34, Nicolas Cadieux <nicolas.cadieux at archeotec.ca> wrote:
>
> Hi,
>
> There is the " value tool plugin" that you can install.  That will give you the values when you move your mouse across  the raster. For more points, install the "point sampling tool" plugin.
>
> Nicolas Cadieux M.Sc.
> Les Entreprises Archéotec inc. 
> 8548, rue Saint-Denis Montréal H2P 2H2
> Téléphone: 514.381.5112  Fax: 514.381.4995
> www.archeotec.ca
>
> On Jun 6, 2015 4:31 AM, djawahar <jawahar_d at hotmail.com> wrote:
> >
> > Hi, 
> >    I have a geotiff dem. How can I get the height information given a pixel 
> > coordinate? I tried to get the data using 
> > gdErr = poDataset->GetRasterBand(1)->RasterIO( 
> > GF_Read, 0, 0, poDataset->GetRasterXSize(), poDataset->GetRasterYSize(), 
> > pBits, bmi.Header.biWidth, bmi.Header.biHeight, GDT_Byte, 
> > 1, nScanSize); 
> >
> > but the data is either 0 or 255. 
> >
> > What is the right way to do this? 
> >
> > Thanks & regards, 
> >
> > D. Jawahar 
> >
> >
> >
> > -- 
> > View this message in context: http://osgeo-org.1560.x6.nabble.com/getting-height-from-Geotiff-DEM-tp5209506.html 
> > Sent from the GDAL - Dev mailing list archive at Nabble.com. 
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