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3D Printing and GIS: Make Your Own 3D Printed Lidar (Topology) Model with QGIS
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- Опубликовано: 1 янв 2022
- In the how-to, I will show you how to 3D Printed Lidar (Topology) Data with QGIS. In my day job, I am a GIS professional. Here is an intersection of my hobby, 3D printing, and my professional life (GIS).
I saw a post on reddit ( / undefined ) describing printing an AIO via QGIS and ArcGIS Pro. I am not a fan of Pro and wanted to just use QGIS. This does limit you to doing 1 lidar tile at a time.
This tutorial will help you create a 3D cityscape from lidar data that can be printed. The links in the tools and materials section are amazon affiliate links.
Tools and Materials
Creality CR6-SE - amzn.to/3HAgKY1
PLA Filament Silk Silver - amzn.to/3pNtp3K
Steps:
1. Download and install QGIS for Windows (www.qgis.org/e...)
2. Download and unzip LASTools (rapidlasso.com.... LASTools is windows only! I unzipped to my C: drive
3. In QGIS, install the "LASTools" and "DEMto3D" plugins.
4. In QGIS, go to Settings - Options - Providers - LASTools. Make sure LASTools is activated and the LASTools folder is pointed to the location where you extracted the LASTools download.
5. Go to the USGS Lidar Explorer (prd-tnm.s3.ama.... Select and download your AOI.
6. Load the downloaded file into QGIS.
7. In the QGIS Toolbox, use the LASTool "las2dem" tool to convert the lidar data into a DEM in TIF format. Toolbox - LasTools - "file - raster derivatives" - las2dem. Use all the defaults and be sure to select a file for output.
8. Load the DEM TIF into QGIS.
9. In QGIS, go to Raster - DEMto3D. In the DEMto3D tool, click the "Select full Extent button (to the right of the "Show Width/Length" checkbox.
Settings:
- Spacing: .2
- Width: 200 (Use the size you want)
- Length: default
- Scale: default
- Vertical Exaggeration: x 2 (may go to 1.5 on terrain with lots of elevation)
- Height: 0 (or the smallest in the DEM).
10. Export to STL
11. Open the model in your slicer. I use .2 layer height and 15% infill. Check the model for weird artifacts. Occasionally you will have high pinnacles due to lidar issues. There are tools in LASTools that can help correct issues but are outside the scope of this tutorial.
12. Print! The model in this tutorial took ~22hours to print.
A note on tall buildings: Before printing an area with tall buildings make sure your retraction is dialed in. You will have stringing.
Let me know if you have questions in the comments.
#3dprinter
#3dprinting
#gis
#3dprint
#3dmodeling
This is GENIUS
It is really cool.
Is there any way to do this but only with one of the selected groups of points? I'm trying to print land with a bunch of trees and I only want to see the land below it, I can deselect everything but the "Ground" points but I'm not sure how to reexport the LAS with only this group of points selected.
Currently trying this out since blosm didn’t have the precision I was looking for, awesome video! Also, I believe those diagonal lines are due to using the “free” version of LAStools. Kind of a shame considering the cost of a license.
If you have ArcGIS Pro (even a demo version), you can do the same thing without LAStools and the lines. Resolution might be better, but I'm not sure .
Hello! Thanks for the tutorial, still trying to make it work. When I run las2dem nothing happens, I've tried multiple times but no tif-file is created. Do you have some idea what the problem might be?
Can you share the lidar you are trying to process so I can take a look?
I can’t seem to get a proper output file that shows up. Any idea on a fix?
What size is the area you are trying to model?
@@minimal3dp one single tile. I followed the exact steps in this guide with the only difference being the location, I chose New York instead of Philadelphia. My problem is in the las2dem, when I choose/ or make an output file every looks normal. Then, when I run the las2dem and have to select that file and drag it onto my screen it’s nowhere to be found.
Thanks for the video. My output DEM has black streaks across it. Is there a way around this?
If you are using LASTool free version, then no. If you have access to ArcGIS Pro, you can create a clean DEM with that. A trial version might be available.
I cant seem to get the TIFF file. Everytime I run this plugin, it runs and then I go check the file I set it to, and nothing shows up. Does it have to be LAS only?
Las or laz should work. Is the area you are looking at large? It might be having issues with the size.
I got it to work, thanks for the video. Do you have a resource on how to remove those diagonal lines that show up after you export?@@minimal3dp
Congratulations for the video, but if I wanted to do it on the map of Italy which program could I use thanks
I will look around and let you know.
Take a look at: www.usna.edu/Users/oceano/pguth/md_help/html/gis_country_sites.htm
I have used a similar process before that you presented and now I am trying to accomplish the same thing but using a CNC machine and carving it out in wood. My stumbling block currently is trying to get rid of the red dashed line that generates when you click on the print extent in DEMto3D. I want it to be the same as my clipped raster and not a square. Ideally I want the area represented by white in between my print extent and my clipped raster not to be milled by my CNC. Any ideas? I have tried changing my no data values without any success.
Do you have access to ArcGIS Pro? If you do, you don't need to use DEMto3D. The line is an issue with the free version of the software. I do believe that you can get a trial version of Pro. Let me know if that helps.
@@minimal3dp yes I have Pro, that is how I clipped my las (extract LAS) and then I converted it to tiff, (Las to Raster) then I bring into QGIS. I haven't been able to find any instructions for DEM to some type of .stl to use in Pro.
@@jahyder1 i think the lines come from using the free version of lastools. If you use pro instead of lastools to do the laz to Dem convertion and use qgis to make the STL you should wind up with a cleaner result.
Whats does the infill adjust?
I was wondering if you had a suggestion to output a color map that matches the 3d print.... I have a vacuum former that i would like to "melt" the printed plastic onto the 3d form.... any suggestions?
What file formats can the vaccum former accept?
@@minimal3dp the vacuum former accepts pre-printed clear plastic sheets that i would print the map on, it heats it, and then presses it against the 3d print...
@@johnrichardson1949 you should be able to generate a color jpeg or PNG with the GIS software. Let me know if you need a more detailed set of instructions.
@@minimal3dp do you do any consulting? I'd like to find an easy way to sync the maps and elevation data easily to produce consumer products
@@johnrichardson1949 I think it is totally doable. Email me at minimal3dp@gmail.com .
what do i do, im getting an error when i try to put my file into qgis. i tried both .las and .laz and both gave me and error when i dragged it into qgis and it didn't show up in the browser. please help
Is there an error code or a screenshot you can share?
@@minimal3dp its ok i think i got it. thanks anyway
🙏🏿🔥🙏🏿
Thanks
hello it does not open map for me
What step is causing you an issue? I am happy to help b7t need more information.
Do you know if there's a Canada Lidar Explorer, or something similar? I've searched for one, with no luck whatsoever.
I have used this for ground elevation data in the past. It does have Canada: app.worldviewr.com/
I would also look at local and provincial government sites and see if you can find your AOI.
@@minimal3dp Thanks!
I got this error message..
"An error occurred during execution of following code:
pyplugin_installer.instance().installPlugin('LAStools', stable=True)"
What OS are you using? Have you installed lastools?