Introduction to working with LiDAR data [via Zoom]
Thu, Apr 02, 2020
5:30 pm - 7:45 pm
Number of available spots
Interested in LiDAR and 3D point clouds but don’t know where to start? In this workshop, you will see how these data sets are created. You will then learn how to navigate in 3D space using CloudCompare and MeshLab. Using basic OpenSource tools, you will find and filter out noise, classify ground points, segment a cloud and create a mesh as well as a raster based model (DEM). In QGIS, you will manipulate the high-resolution ground and canopy level DEMs and produce great looking (but also useful) hillshade and slope models.
To participate you have to prepare your computer with the following software:
Mandatory software to install AND test before the workshop:
- CloudCompare (OpenSource and Free), mandatory if you want to do the exercises in the workshop.
- Download the “Latest stable release (2.10.2 Zephyrus)” with or without Stereo support. The “installer version” needs your computer administrator password. The “archive version” probably just needs to be unzipped in any folder. The admin password is probably not needed.
- If your program crashes at start up (please test) and if you have a very old computer (7 to 10 years), use the “Last version compatible with old intel / ATI graphic cards (2.6.3 beta)”
- You will see Mac and Linux distros also. Check you Operating System combability.
- You can test with the …LiDAR_Workshop\Exercise3_Free4All\FortSenneville_rbg_irnc_EPSG2950.las file you downloaded.
Optional software to install:
- You may want to install QGIS for one or two steps in the workshop. If you have ESRI ArcGIS, you could use it but you will need to figure out the steps on your own. If you don’t have QGIS, I recommend it. The current version 3.12 has growing pains with people reporting some problems with the software and various CRS (coordinate reference systems). This is being actively worked on by the development team.
- I recommend the OSGeo4W Network Installer (64bit) for advanced users. Install the desktop software, not the server software.
- I recommend the QGIS 3.12 or 3.10 standalone Installer (64bit) for normal users.
At the end of this workshop, you will be able to
- identify and work with various LiDAR file formats
- manipulate a 3D Point Cloud file
- build a raster based DTM
- Manipulate data with various OpenSource software.
Prerequisite: knowledge from workshop “Introduction to QGIS” or equivalent is recommended.
To participate, please register below. You will receive a Zoom link for the workshop. The Zoom invitation will be under the name of Julie Bourbonnais. As the workshop needs some data downloads for which you will get the link at 3 p.m., the cut-off time is 3 p.m.
The workshop will take about 2 hours with a 15 minutes break. The instructor is Nicolas Cadieux.
If you are a McGill student, faculty or staff member, please use your McGill e-mail address.
Bookings are closed for this event.