I've got the same questions :) How will you get the DTM if you don't have info on the ground ?
I did some search for publications but couldn't find if there were any methods just by using UAV data, do you have any recommendations? Ciao! Nuno On 15 May 2015 at 14:40, Adam Laža <ad.laz...@gmail.com> wrote: > Hi all, > > I've got some data from UAS (SenseFly eBee) exported as point cloud. I'd > like to ask if there's any way how to classify the data in GRASS. As an > input I have a point cloud exported in .las or .txt file. As an output I > need another .las file containing only terrain (I need to filter out > objects, buildings and vegetation) for next step which is generating DTM. > > I've already tried some modules, import(r.in.lidar, v.in.lidar) works > well. Then I focused on v.lidar.* modules (v.lidar.edgedetection, > v.lidar.growing, v.lidar.correction) but already the first step of > recognizing and extracting object didn't work for me. I suppose it's due to > the v.lidar.* modules need data only from LiDAR, but I have data from > phtogrammetry (eBee carries Canon RGB camera). > > Any idea how to classify my data? > > Thank in advance, > Adam > > Data sample at google drive: > las: > > https://drive.google.com/file/d/0B3qa8r8b0sq0TTdnSVNHdE1UQ2M/view?usp=sharing > txt: > > https://drive.google.com/file/d/0B3qa8r8b0sq0NVFRMmNEZHNkbDA/view?usp=sharing > > > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user > -- Nuno César de Sá +351 91 961 90 37
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