I wanted to try making a new route in the Editor after abondining my previous route project 6 months ago. As by the title you can see that i wanted to try a French route for my new project (Will never be finished though in all fairness due to knowing nothing about blender). Anyway i started and got the path and location pins done, but when it came to lidar in qgis i dont know how to get it. i used this https://geoservices.ign.fr/lidarhd but it doesnt download as a dtm file (where as the guide and my previous UK project Shows/did). it downloads as a LAZ.file not a tif it shows up as a bunch of coloured dots when putting it in qgis How do i get France dtm lidar to work in qgis so i can continue? Thanks in advanced if anyone can help
Lidar data can be contained in several file formats including geotiff, xyz, dtm or laz/las. So you get the right data, its just in a different format. IIRC there is a tool in QGIS which allows you to convert las files. Take a look at this tutorial. I think it could be very helpful for you. https://forums.dovetailgames.com/threads/laz-las-file-conversion-tutorial.76688/
Thank you, will take a look later, still very new to this especially in qgis, the rest i know (adding the lidar to editor,track laying) just the new lidar file (LAZ) confused me. Much appreciated for the help
I'm currently on vacation so I can't check if it's still the same as before, but I downloaded my LiDAR data here: https://geoservices.ign.fr/rgealti I seem to remember that if you click through the (unzipped) download’s subfolders, you eventually get to a place where you have to choose between three subfolders. One of them contains .ASC files, which also appear in grayscale in QGIS. You need these, the rest (e.g. the folder with colorful .TIF files) can go. The rest of the process should then look exactly the same as with LiDAR data from other sources. PS: If this helps you later, I think I also know that the CRS of the French LiDAR tiles was LAMB93.
Yh thats the same website i used only i was on a different page where you click the squares you want (or draw a polygon but the clicking individual squares was better for me) and when i download it just downloads a LAZ.file no zipFolder. Ive ran into another problem where using the LAZ tutorial when you have to split it doesnt download anything. The CRS was something i did need so Thank you for providing that as well anyway I dont want to disturb you vacation so enjoy and il look into it some more, more then happy to wait in the mean time. Again thanks UPDATE (for later). Ok i think ive found the folder version of it, just waiting to finish download. But its for whats called 'Department' area which is a huge area. Is this correct becuse thats a lot of lidar data i wont need, and if it is correct that sucks as i need 2 Departments lol.
bonjour est ce que vous avez réussis a utiliser/transformer les données lidar pour tsw editeur car moi aussi j'essaye de les utiliser mais je n'y arrive pas. si vous avez réussis, serait il possible de me donner les étapes a suivre, merci.
Hey there I‘m happy to help, but currently on vacation so all of this is from my memory. So no guarantee that this works but I‘ll do my best. No clue how far you already are in the whole process, so here‘s a step-by-step guide from the very beginning. And just a friendly reminder that you are asked to post in English, per forum rules. Anyway, here we go: Visit https://geoservices.ign.fr/rgealti and download the lidar data for your département. They are all listed here with the respective download links below. If there‘s multiple links for one département, you‘ll need to download all of them. The files you downloaded come either in .7z or in .7z.00x file format. If it‘s only ".7z", fine, go on with step 3. If not, it‘s a split zip file that needs to be recombined first (iirc). In order to do that, you‘ll need a program like 7-Zip or WinRAR, not sure how exactly that works though. Found this: https://sourceforge.net/p/sevenzip/discussion/45797/thread/8cc5b690/ Anyway, at the end you‘ll have a single .7z file, which is what we want Unzip and delete the .7z file. You‘ll only need the decompressed one In the decompressed folder which you‘ve got from unzipping, click through the subfolders until you get to a point where you have to choose between 3 subfolders. One of them contains .ASC files (these appear in grayscale when dragging into QGIS), the others contain colorful .TIF files. You‘ll only need the subfolder with the .ASC files, the rest can be deleted Open QGIS. Set the CRS to LAMB93. I also recommend using the OSM overlay. Drag the .ASC files into QGIS. This may take a while, depending on how large the département and how strong your PC is. Important note: If you are working with multiple départements, do not import them all at once! Repeat steps 6 and 7 with one département at a time, otherwise even the strongest PC will struggle. As you downloaded the LiDAR files for an entire département, you‘ll have much more data than you need. I cannot recomment enough to, before you continue with step 8, find out which of the tiles you dont need and delete the respective tiles (otherwise files will get way too big and your PC may explode during the following steps :P). This is absolutely the worst part of the whole thing, so here are some tips: I found out which .ASC files I dont need by their file name, which is more or less the only indicator. The names contain, iirc, the latitude/longitude of the tiles according to Lambert 93 earth projection. When you hover your mouse over a location in QGIS, you‘ll find the coordonates of this location in the bottom right. It‘s these numbers what you‘re looking for in the tiles‘ file names. And when you found the tiles you don‘t need, just delete them inside file explorer. Good luck When you‘re done with all of this, congratulations! The worst part is done. From here on, you can follow Lulon‘s LiDAR tutorial starting from step 3 (https://forums.dovetailgames.com/threads/lidar-tutorial.74374/), which is what I also did. Worked well for me Just keep in mind the tiles’ CRS is LAMB93. Small tip: Before starting with the steps from Lulon’s tutorial, maybe close QGIS or even restart your PC first, and then reimport all the tiles you’re left with, just to make sure there’s no unnecessary stuff left in your cache. Especially when doing longer routes (you‘re the LGV Nord guy right?) your PC would be grateful. Hope this helps!
