Questions tagged [laz]
It is the compressed version of lidar las files from the open source software LASzip
52 questions
0 votes
0 answers
16 views
Assessing the success of GEOID conversion using VDatum
I have a set of LAZ files that I'm trying to convert to GEOID18. The original files are assigned EPSG:6350+5703 - GEOID12B. I reprojected the files to EPSG:6340+5703 - GEOID12B using PDAL and then ...
0 votes
0 answers
37 views
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 ...
- 11
0 votes
0 answers
45 views
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 ...
1 vote
0 answers
48 views
Deleting temporal folders when batch processing of LiDAR laz files in QGIS Modeler
I created a model with Point cloud input in QGIS, two processing steps for DTM and DSM GeoTIFF exports (temp files) to create a canopy CHM layer (GeoTIFF). Model: Laz point input to import laz files ...
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1 vote
1 answer
47 views
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 ...
- 171
1 vote
1 answer
109 views
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 ...
- 168
2 votes
1 answer
160 views
What is the EPSG for Czechia (Czech) DMR 5G Lidar Data?
The CUZK geoportal has lidar for Czechia. I have downloaded some LAZ data, and I need to work with the data, and for that, I need the EPSG. Usually, I use LasTools lasinfo to read the header and get ...
- 149
0 votes
1 answer
45 views
can readLAS be used to read lidar from a URL or ftp site?
Is it possible to read from a url with readLAS or even with a catalog? I am try to read lidar from the USGS lidar archive with lidR, but I am getting an error. I have tried a couple of approaches ...
1 vote
2 answers
89 views
Is there a way to control the number of points per node when writing to COPC
I'm trying to write a very large (6TB) collection of LAZ files into a collection of COPC files. When viewing these remotely using a webviewer, I'm running into performance issues when the viewer has ...
1 vote
1 answer
108 views
Shifting points of LAZ point cloud using Python
I want to shift the coordinates of a .laz pointcloud by tx, and ty with laspy. After reading more about the offset and scale attributes of a las header. I see that Xcoordinate = (Xrecord * Xscale) + ...
- 11
0 votes
2 answers
93 views
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 ...
- 31
0 votes
3 answers
2k views
Loading laz point cloud in QGIS error: Invalid Data Source
I have problems opening a point cloud laz file in QGIS 3.34.0 Prizren on Win 10, PDAL version 2.5.5, Python version 3.9.5. I have older "good" laz-files that I have no trouble opening in ...
- 80.4k
5 votes
4 answers
1k views
How can I find the Point Cloud Tools in QGIS 3.34 Mac Version?
I just downloaded the QGIS Latest Release Version 3.34 (Prizren) for Mac to try the new Point Cloud tools, that should be natively available according to this post: https://www.lutraconsulting.co.uk/...
- 2,440
1 vote
1 answer
260 views
How do I filter out Unclassified points from a LAS file and generate contours and a .dem file in QGIS?
I downloaded lidar data from https://gis1.oit.ohio.gov/geodatadownload/ and imported a LAS file into QGIS. I want to generate contours and a .dem file from the Ground data. I have been able to ...
- 11
0 votes
0 answers
183 views
Trouble reading LAZ downloaded from NOAA LiDAR database
I am attempting to download the raw point cloud of a LiDAR acquisition from NOAA's Office of Coastal Management's LiDAR database using R. The data download with out error, but when I read in the laz ...
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