[GRASS-user] i.rectify (or gdalwarp -off topic)
Dear all, sorry to post this issue here, but maybe some of you can help me. Following Markus Neteler (and other) suggestioins, I was able to automatically generate a ground control point file for a large set of images. Now I have (at least) two directions. 1. rectify the image using i.rectify 2. use gdalwarp out of grass In both ways I face the same issues: a) how can I input my text file for a certain image and b) what is the proper format that I need to follow when preparing the file (for both i.rectify and gdalwarp)? Detail: the images are JPG fotos taken using a fixed camera in the top of a tower, so the images are nearly the same scene. Thanks a million -- Miltinho - m...@rc.unesp.br Laboratório de Ecologia Espacial e Conservação - LEEC Depto de Ecologia - UNESP - Rio Claro Av. 24A, 1515- Bela Vista 13506-900 Rio Claro, SP, Brasil Fone: +55 19 3526-9647 (office) 19 3526-9680 (lab) Cel: 19 9853-3220 / 19 9853-5430 Depto Ecologia http://ib.rc.unesp.br/#!/departamentos/ecologia/ PG ECO BIODIV http://ib.rc.unesp.br/#!/departamentos/ecologia/pos-graduacao-em-ecologia-e-biodiversidade/ CV http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6mostrarNroCitacoesISI=truemostrarNroCitacoesScopus=true Google citations http://scholar.google.com/citations?user=OWX_2eAJ ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] i.rectify (or gdalwarp -off topic)
Milton wrote: Following Markus Neteler (and other) suggestioins, I was able to automatically generate a ground control point file for a large set of images. Now I have (at least) two directions. 1. rectify the image using i.rectify 2. use gdalwarp out of grass In both ways I face the same issues: a) how can I input my text file for a certain image and b) what is the proper format that I need to follow when preparing the file (for both i.rectify and gdalwarp)? Detail: the images are JPG fotos taken using a fixed camera in the top of a tower, so the images are nearly the same scene. Hi, If are familair with Bourne shell scripting, you might have a look in the grass6 addons SVN for i.warp and i.points.reproj scripts. (i.warp is a bit of a mess, but uses gdalwarp with grass's POINTS gcp file) the grass POINTS gcp file is pretty easy format, # image target status #east northeast north (1=ok) # 2.537267 10.230953 1393516.34 4902494.781 8.038078 10.219225 1419326.28 4903305.401 13.531500 10.212226 1445136.43 4904007.831 8.0297182.291376 1420414.87 4866269.911 2.5310902.302488 1394760.64 4865459.671 19.005416 10.198488 1470946.75 4904602.121 18.9879682.271928 1471724.12 4867566.031 13.5192342.281374 1446060.02 4867342.381 6.186646 14.579820 1410021.804000 4923820.6670001 5.233682 14.892164 1403912.826000 4925688.7450000 4.728343 14.134303 1403217.899000 4921427.9140001 8.716253 13.454576 1421998.543000 4918833.2690001 regards, Hamish ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
