Interpolating Point Clouds to Raster with IDW and TIN in QGIS

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Since QGIS 3.32 Lima, native processing tools are available in QGIS to interpolate point clouds to rasters. First we'll use the Inverse Distance Weighting (IDW) method to create rasters of different spatial resolutions. Next, we'll use the triangulation (TIN) method and compare the results. For comparison, we'll use 2 linked 2D views and elevation profiles.
QGIS version: 3.32 Lima
Open Data: AHN4 from geotiles.nl/
Blog on native point cloud processing in QGIS by ‪@LutraConsulting‬: www.lutraconsulting.co.uk/blo...
Do you want to learn more about point cloud processing and 3D visualization in QGIS? Enroll for my course at ‪@udemy‬ : www.udemy.com/course/qgis-poi...
0:00 Introduction
1:03 IDW interpolation
3:23 TIN interpolation
4:39 Create map themes
5:10 Create two linked 2D Map Views
5:48 Elevation profiles
#qgis #pointcloud #3d

Опубликовано:

1 авг 2024

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Комментарии : 20

@gisworld-tech Год назад

Great thanks 🙏

Год назад

Great 😊

@NIXONGR123 Год назад

💪💪💪💪💪 thanks 💪💪💪

@martindobias3238 Год назад

A quick tip: for higher quality hillshades (especially when zoomed in), make sure to also check "early resampling" checkbox in the layer styling panel...

@HansvanderKwast Год назад

Thanks!

@raiyans Год назад

Thanks for such a helpful tutorial. I have two questions. 1. when you choose the Z attribute to create raster, is this Z value represent the ground elevation (DTM) or ground and objects elevation (DSM)? and 2. to analyse the slope, what would be the best suitable interpolation method to create raster (idw/TIN)? thanks a lot.

@HansvanderKwast Год назад

The Z attribute comes with the point cloud. If it's lidar, it's normally the first return number, which results in a DSM. If you want to have the ground, you need to use to filter. For example with the ground classification attribute. See this video on filtering: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-4yphXhP9CvE.html. What is best to use for slope depends on the density and distribution of points. Best is to compare both results and choose the one that gives the best results.

@raiyans Год назад

@@HansvanderKwast Thanks a lots. it is so helpful. I am new to LiDAR data processing and love to play around it. Just find that the point cloud conversion tool is missing in my qgis. I am using 3.32 version on a Mac. do you have any idea? thanks

@HansvanderKwast Год назад

@@raiyans I'm not familiar with Mac. Probably you miss pdal. Alternatively, you can install QGIS on conda, which should work on all platforms.

@joaopereira9306 11 месяцев назад

@@HansvanderKwast Thank you for your reply, i was searching for this

@joaopereira9306 11 месяцев назад

@HansvanderKwast i was trying to filter out a point cloud by the Point Cloud expression, however i want to extract two bands (ground and wire conductor) but it is giving me error, i tried Classification = 2 AND 14 and Classification = 2 OR 14 but with no success, do you know if it isnt possible to extract more than one feature from the point cloud?

@bob-pq6ef Месяц назад

Hi Hans, is it perhaps possible to use plugins from a new version 3.32 into an older version (mine is now 3.28) ? It always takes me so much time download & customize a new version and then re-install the plugins and add them to my toolbars New versions come out very often and I don't want to keep re-installing QGIS and go through the same process I would like to use the point cloud conversion plugins (from 3.32) as per your example but I don't know if that is easily done? I suspect there is an easier way to download a new version of QGIS and still be able to keep all toolbars and settings, perhaps an idea for a video ? Thanks for your great videos

@HansvanderKwast Месяц назад

QGIS installations share the location of your profile. Your profile stores your plugins amongst other settings. See ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mKTRHL5YLjI.htmlsi=bCjHsy5H-h60jtMf. Only if your plugin is not supported by the QGIS version, it will not load. The point cloud tools in the video are core functionality, so you can only use those tools from 3.32.

@maiyourathaankarunanandara3382 9 месяцев назад

Hi Hans I have qgis 3.22.16 Version installed in my computer, but I am unable to see this point cloud tools in processing tools bar Is this an external plug-in ?

@HansvanderKwast 9 месяцев назад

These tools are available since version 3.32 as written in the description of the video.

@maiyourathaankarunanandara3382 9 месяцев назад

Thanks a lot did not see your discription before

@jirkapalacky 28 дней назад

Is this possible in QGIS 3.36.3 for Mac? Could you please advise how to proceed? I don't see the Point Cloud Conversion Tool in the tool menu.. Thank you.

@HansvanderKwast 28 дней назад

You need to have pdal in your QGIS installation. The easiest on Mac is to install QGIS in a conda environment.