[GRASS-user] rectifying digital images

[Markus Neteler]

On Jan 5, 2008 4:46 PM, Maning Sambale <emmanuel.sambale at gmail.com> wrote:
>
> > OK, I have added my draft recipe here:
> > http://grass.gdf-hannover.de/wiki/Orthorectification_digital_camera
>
> It says:
> Usually such high-resolution DEMs (raster cell length below 1m) are not
> easily available. Therefore, interpolation of a given DEM to a higher
> resolution is recommended
>
> The dem I have is the SRTM data (90m).  Eventhough I can interpolate
> them I don't think it can be useful for i.ortho.photo's purpose.  Or is
> it?

Well, you have what you have, I think. For which country do you need
the DEM?
Resampling helps at least to avoid ugly stairs (of course the information
content remains the same).

> >>I once received a script collection to use Octave and GRASS
> to perform bundle block adjustment but never got that working
> (still have the code, we could contact the author).
>
> Can we use this (SBA)?

Will write to the author, but my contact is from 2002.

Markus