Hello Nikos Very good point... As far as I can see, the order is relevant in "overlapping pixels". 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.
Thanks Kat 2010/10/14 Nikos Alexandris <[email protected]> > katrin wrote: > > > > I have a sequence of satellite images (e.g 1 in the north, other in the > > > center and other in south) that I want to merge in a single image. I > > > found three GRASS methodologies: > > > - r.series > > > - r.patch > > > - i.image.mosaic. > > > Which one is the best to perform what I need? > > Hamish: > > > I'm not really familiar with i.image.mosaic, but r.patch would be the > > one to use if you have three satellite images taken in sequence which > > you wish to merge into a single image. > > > r.series is usually used to merge overlapping maps, r.patch to merge > > adjoining maps. > > > to make r.patch easier, you can do: > > g.region rast=map1,map2,map3 > > > to extend the region settings to the outer bounds of all three maps. > > Something critical, if I am not wrong: the order of "map1,map2,map3" is > important (when patching overlaping maps). Check the r.patch manual. > > Nikos >
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