<div dir="ltr">Hi silvia<div><br></div><div>with my limitated experience in this area I would do</div><div><br></div><div>1) filter only last points</div><div>2) filter with pmf or smpf... and here you have to play with parameters</div><div>reading experience, there is no a generic set of parameters, because they depend on the size of objects you want to "remove", sensor noise, terain conformation and point of view espect the terrain </div><div><br></div><div>=> you have to check the parameters :(</div><div><br></div><div>you can read may papers related with pmf... no idea about papers specific to high vegetation cover.</div><div><br></div><div>cheers</div><div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><br></div><div>Luigi Pirelli<br><br>**************************************************************************************************<br>* LinkedIn: <a href="https://www.linkedin.com/in/luigipirelli" target="_blank">https://www.linkedin.com/in/luigipirelli</a><br>* Stackexchange: <a href="http://gis.stackexchange.com/users/19667/luigi-pirelli" target="_blank">http://gis.stackexchange.com/users/19667/luigi-pirelli</a><br>* GitHub: <a href="https://github.com/luipir" target="_blank">https://github.com/luipir</a><br>* Mastering QGIS 2nd Edition:<br>* <a href="https://www.packtpub.com/big-data-and-business-intelligence/mastering-qgis-second-edition" target="_blank">https://www.packtpub.com/big-data-and-business-intelligence/mastering-qgis-second-edition</a><br>* Hire me: <a href="http://goo.gl/BYRQKg" target="_blank">http://goo.gl/BYRQKg</a><br>**************************************************************************************************</div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, 10 Apr 2019 at 12:02, Silvia Franceschi <<a href="mailto:silvia.franceschi@gmail.com">silvia.franceschi@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-size:small">Dear all,</div><div class="gmail_default" style="font-size:small">is there someone who is working with point cloud data to extract the DTM in areas with high vegetation cover?</div><div class="gmail_default" style="font-size:small">Do you have experience on which of the different filters available in the PDAL is better to use? which values of the parameters did you use?</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Do you know if there are papers available on applications on these use cases?</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Any suggestion is appreciated! :-D</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Regards</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Silvia</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small"><br></div><div><br></div>-- <br><div dir="ltr" class="gmail-m_4223129948149020485gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div style="font-size:small">ing. Silvia Franceschi<br>Via Latemar, 22</div><div style="font-size:small">38030 Castello di Fiemme (TN)<br><br>tel: 0039 -3384501332</div></div></div></div></div></div></div></div>
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