Questions tagged [las]
An industry-standard binary file format that maintains information related to lidar data.
336 questions
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Bug in lidR when identifying tree canopy surfaces in LAScatalog?
I am trying to identify tree canopy surfaces using lidR in an urban area. To do this, I have been trying to use the readLAScatalog() functionality to prevent memory issues.
If I use my code on a ...
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Pdal's Litree is taking too long
pdal's litree is taking too much time. the script is running for 45 minutes and it is only at the 4th tree.
PROJ: proj_as_wkt: Open of /home/adminis/conda/envs/pcd-editing/share/proj failed
(pdal ...
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Converting lat/lon in WGS84 to the local coordinate system
I have a GPS trajectory with coordinates in WGS84 (latitude and longitude). I also have a LAS point cloud, which uses a local coordinate system. The LAS file defines a reference point with known ...
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Using LidR to add new attribute to LAS file point cloud from GeoTIFF raster
I am currently trying to add a new attribute to a LAS file so I can use it for classification of the points, based on the values in a GeoTIFF file. For this I am using the merge_spatial function in ...
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PotreeConverter output structure incompatible with iTowns PotreeLayer – No /r/xxxxx/rxxxxx.cin or .hrc files
I'm currently working on a 3D visualization project using iTowns, and I’m trying to convert my point cloud data into Potree format to improve performance and ensure compatibility with PotreeLayer in ...
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Getting NoData strips, and high memory usage, when processing block-maximum/minimum rasters from LiDAR using Whiteboxtools
I'm processing LiDAR elevation data, sourced from Discover GIS Data NY, into block-maximum and block-minimum rasters (GeoTIFF) with WhiteboxTools' LidarBlockMaximum (and LidarBlockMinimum) tools. I'm ...
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lidR does not update header when both VLR and EVLR supplied
I am using lidR version 4.1.2 and some of my files have projections written in both the VLR and EVLR fields. However, when I use st_crs(some_laz) = "some_crs" only the VLR is being updated ...
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Merging 300GB + of las files into one laz file
I'm working with point cloud processing and I'm having some issues to manage to merge the point cloud files I have, is something around a billion points in las format.
I need to merge them into a ...
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Arbitrary Cartesian coordinate systems in OGC WKT1
I have a pointcloud obtained from a LiDAR sensor, and this pointcloud uses a local Cartesian coordinate system, defined by the initial pose of the sensor, together with GNSS data obtained by the ...
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Conversion from XYZ to LAS causing same values for lat,long
I am trying to convert XYZ to LAS using the laspy library.
Following are few points from input XYZ:
73.857515249445171 18.514095016670616 572.279999999999973
73.857515225451863 18.514098631209944 572....
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Difficulties producing a colorized point cloud for QGIS
For some project, I am trying to colorize a point cloud using the orthophoto from the same coordinates.
I followed various tutorials, and using cloudcompare, i managed to produce a colorized point ...
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PDAL readers.las Error returning GDAL Failure (1) "components of the compound CRS do not belong to one of the allowed combinations of ..."
Encounter following errors while trying to read .las data from LidarBC (dwld data here if needed). I am using pdal=2.7.1 and have libgdal=3.8.5.
When i try to translate the linked file with
pdal ...
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Why are there "no returns" in my point cloud and am not able to display or process it in lidR?
I have a point cloud I collected and converted to a .las in the proprietary software "FARO Connect". I am able to visualize the point cloud in the software. However, when taking the .las ...
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Why does readLAS() not work in older versions of lidR anymore?
I am unfortunately dependent on an older version (4.0.4) of the lidR package due to a package dependency. Strangely enough, the import of LAS files with readLAS() no longer works since a system update....
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R: 'area' function for las-file [closed]
I want to work on this project: https://gitlab.gwdg.de/tanja.kempen/skidtrail-detection/-/blob/main/README.md?ref_type=heads where I'm using the SkidTrail_Preprocessing.R R-Script.
Software: RStudio ...
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