Hello Nikos<div><br></div><div>Very good point... As far as I can see, the order is relevant in "overlapping pixels". </div><div>About the i.image.mosaic, it was developed by Markus. I gave a look at the Script (Python version) and I'm not sure what is the advantage of this script against r.patch.</div>
<div><br></div><div>Thanks</div><div>Kat</div><div><br><div class="gmail_quote">2010/10/14 Nikos Alexandris <span dir="ltr"><<a href="mailto:nikos.alexandris@felis.uni-freiburg.de">nikos.alexandris@felis.uni-freiburg.de</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im">katrin wrote:<br>
<br>
> > I have a sequence of satellite images (e.g 1 in the north, other in the<br>
> > center and other in south) that I want to merge in a single image. I<br>
> > found three GRASS methodologies:<br>
> > - r.series<br>
> > - r.patch<br>
> > - i.image.mosaic.<br>
> > Which one is the best to perform what I need?<br>
<br>
</div>Hamish:<br>
<div class="im"><br>
> I'm not really familiar with i.image.mosaic, but r.patch would be the<br>
> one to use if you have three satellite images taken in sequence which<br>
> you wish to merge into a single image.<br>
<br>
> r.series is usually used to merge overlapping maps, r.patch to merge<br>
> adjoining maps.<br>
<br>
> to make r.patch easier, you can do:<br>
> g.region rast=map1,map2,map3<br>
<br>
> to extend the region settings to the outer bounds of all three maps.<br>
<br>
</div>Something critical, if I am not wrong: the order of "map1,map2,map3" is<br>
important (when patching overlaping maps). Check the r.patch manual.<br>
<font color="#888888"><br>
Nikos<br>
</font></blockquote></div><br></div>