[GRASS-user] assign heigght value to pixel(x,y)

[vinod kumar]

Hi Markus Netler,

Using r.mapcalc with an if() condition might work but how can we give a
condition without knowing anything about pixels(like.. where it is located
and height.. etc).
i am doing this for to assign height values to some pixels where i do not
know the buildings location in a raster map graphically.

I think we are on the way to the solution. next step would be the solution.

thanks,
nani.


On Sun, Apr 17, 2011 at 8:06 AM, Markus Neteler <neteler at osgeo.org> wrote:

> On Sat, Apr 16, 2011 at 10:36 PM, vinod kumar <nani.kunithi at gmail.com>
> wrote:
> > Hi Markus Neteler,
> >
> > yes, importing pixel values with r.in ascii and patch into existing into
> > raster is simple easy for particular pixel,
> > but if we want to assign a height value to more pixels, for example
> > assigning height value to buildings in a
> > particular area in raster map is difficult as we don't no to which pixel
> > value we have to assign height value and
> > checking each pixel value is difficult.
>
> Now I understand a bit more: so use r.mapcalc with an if() condition.
>
> Markus
>
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