[GRASS-user] Automatic Orthorectification

Jachym Cepicky jachym.cepicky at gmail.com
Thu Mar 26 02:57:13 EDT 2009


the GCPs are located in each image at known locations, you can create
necessary files in a batch script:

 - you have to create the group for each image (i.group)
 - you have to set the target and ref files for the group (i.target)
 - you have to create the POINTS file - manually

try to rectify one image by hand and then see grassdata/LOCATION/MAPSET/group/GROUP/*

however, if the position of GCPs is unknown to you, I'm affraid, you
have to do it by hand


On Wed, Mar 25, 2009 at 03:04:43AM -0700, Petrone Orlando Mauro wrote:
> Hi to all,
> I'm trying to use GRASS 6.4 (installed on UBUNTU) to realize a system to automate the orthorectification process.
> I have a group of little images (chip of 256x256 pixel) that I want to use to orthorectify an image.
> Can grass use the little chip to create the RPC polynomial without any external action? I try i.points.auto, but I must set the GCP manually... 
> Thank you
> -- 
> View this message in context: http://n2.nabble.com/Automatic-Orthorectification-tp2531561p2531561.html
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Jachym Cepicky
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