[GRASS-user] Automatic Orthorectification

[Jachym Cepicky]

Hi,

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

jachym

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
> -- 
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-- 
Jachym Cepicky
e-mail: jachym.cepicky gmail com
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