chickenhawk66 Posted July 27, 2012 Report Share Posted July 27, 2012 Hi, I work on a private project where I want to use a ASTER DEM for. Unfortunatly, that area of the world is quite raw considering the quality of the dem (mostly spikes). I tried to install an ERDAS Imagine 11.0 version on a win7 64 box, but the lmgrd server does not run despite doing the correct actions in the readme. Is there an alternative software that could be used for correcting the spikes in the DEM? Thanks, CH66 Quote Link to comment Share on other sites More sharing options...
HTC Posted July 28, 2012 Report Share Posted July 28, 2012 you can used envi 5.0 to correctet aster Dem. Quote Link to comment Share on other sites More sharing options...
chickenhawk66 Posted July 30, 2012 Author Report Share Posted July 30, 2012 Thanks for the tip, never heard of it. I'll see where I can get it to give it a try! Best, CH66 Quote Link to comment Share on other sites More sharing options...
chickenhawk66 Posted July 31, 2012 Author Report Share Posted July 31, 2012 Hi, I checked it and find it's great, but a bit difficult. I loaded one of the troubled geotiff elevation files in Envi, but have trouble with the correction of the spikes, see image. Anyone here who could explain in a nutshell where to go to correct the spikes? Thanks, CH66 Quote Link to comment Share on other sites More sharing options...
pasfans01 Posted July 31, 2012 Report Share Posted July 31, 2012 If you want to do it automatically, I think majority filter will do the job, but it will introduce some generalization to the undistorted areas, so yeah the quality of the DEM will decreases, ENVI has built in majority filter on it, look at ENVI Menu>Filter and then if you want to do it manually, use DEM editing tool at ENVI DEM Extraction module, Quote Link to comment Share on other sites More sharing options...
chickenhawk66 Posted August 1, 2012 Author Report Share Posted August 1, 2012 Thanks for helping! Hmm, I did some serious RTFM and found that the ENVI 5 I have here doesn't have the license for the DEM extraction module. I don't want to generalize the DEM with a global filter because of the quality loss, as you stated. Quote Link to comment Share on other sites More sharing options...
chickenhawk66 Posted August 1, 2012 Author Report Share Posted August 1, 2012 Just for the record, I got it to work now. Either the "smooth" or the "Thin plate spline" method works well in bringing down those spikes. Cheers! CH66 Quote Link to comment Share on other sites More sharing options...
pasfans01 Posted August 7, 2012 Report Share Posted August 7, 2012 did it brings some generalization to the undistorted areas? Quote Link to comment Share on other sites More sharing options...
meodensi Posted August 17, 2012 Report Share Posted August 17, 2012 Use Global Mapper and export your DEM out, while implementing it, select "smooth" option for the output. Cheers. Quote Link to comment Share on other sites More sharing options...
sigologo Posted August 18, 2012 Report Share Posted August 18, 2012 Hi everyone.... For me ASTER_DTM from sulsoft is better for corrected DEM.............. http://www.envi.com.br/asterdtm/ I have installer .sav but not possible install another machine!!!!!only for one license, any idea for disassembly this script and unlock for all machine.......... Regards Quote Link to comment Share on other sites More sharing options...
3dbu Posted August 21, 2012 Report Share Posted August 21, 2012 Nice share thks. Quote Link to comment Share on other sites More sharing options...
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