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Questions tagged [las]

An industry-standard binary file format that maintains information related to lidar data.

References

LAS specification - version 1.4

Other LAS file types

Log ASCII Standard (LAS) is a standard file-format common in the oil-and-gas and water well industries to store well log information. Use the tag for questions related to Log ASCII Standard files.

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Reading Point Clouds from .las files

I'm working on a project that's using .las lidar files. I googled and found that PDAL can be used to convert .las to .pcd files, so that I can use the PCL library. I converted files from .las to .pcd using PDAL. When I tried to read the pcd files…
Mohamed Hedeya
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How to import and perform calculation in a las files on python?

I hope you are all well. I want to handle .las files in python. These are specific ascii files for geophysical profiling. They have a header and then a series of columns containing various information. What is the best way to start? The main…
Tiago Webber
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how to add curve header to output of las.write() with lasio.py

I'm using the python lasio.py library and I must be missing in something in the docs. Is there a native way to add headers columns in the ~ASCII (~A) section of the output file. I need to output something like ~A DEPTH DT RHOB NPHI …
ris15
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How to get unique "point source ID's" for LIDAR block?

I'm trying to get information about unique flightlines appearing in a block of LIDAR data using a laspy. I have already tried running a lasInfo module for the whole block, but what I get is just a min and max point_source_ID values opposed to list…
MPu
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How to install python pdal on Mac?

I'm installing python pdal on my new Mac. This Mac runs python 3.6 and anaconda has been already installed. While trying to install pdal using command line "pip install pdal" which is recommanded by pdal documentation, I got error msg: No such file…
Yun Zhao
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Creating pointer to read from .las binary file throws bad_alloc error

I am currently writing code to read in a .las (LIDAR point data) file. After reading in the file, I created a pointer to iterate through all the points. However, it gives me a bad_alloc error. The only thing I can think of is that header is not the…
p0ps1c1e
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Extract map coordinate from Point Cloud data

I am trying to render a map beneath the point cloud render view. I can see that other viewers render 2d maps beneath the point data rendered output. I am not able to find what coordinates in the lat and long of a map can be rendered. This is the…
Pravin Poudel
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saving strings in las/laz data format

Can you store stings in las/laz data please? For example every value in point source id is associated with a string label. Can I store that array of strings in a las data format?
Aenaon
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How to display LAS file on ForgeViewer

I'm looking for a way to display LAS files on ForgeViewer. Currently I can extract points for display using THREE.PointCloudMaterial. but the extraction is quite slow and I would like to know more possible methods.
capa worker
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Does the function iterative closest point (ICP) exist in R?

Does an R function iterative closest point (icp) exist for use with LAS objects? I see the options morpho::icpmat() and mesheR::icp(), but these appear to use mesh3d objects instead of LAS. I was hoping to find something similar to icp from the…
fraziertj
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How to convert laz/las lidar data to raster

This is a link to my data: https://drive.google.com/file/d/1Bof2AqB-m2vbBPSH7WZntlnTrdr-NliJ/view?usp=share_link By default, the reduce function in the PointCloudRasterizers package, reduces a dataset of pointcloud based on z (height/depth) ds =…
farhat
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Looking for Voxel Filtering library for nodejs

I'm looking for nodejs library that can do downsampling like voxel filtering for LAS file format, preferably. pcl.js looked promising, but it only supports on the web browser, not backend nodejs. Any recommendations? Or, should I just interoperate…
minimanimo
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Iteratively open a .las file, perform some operations, and save a new .las file with the same name

i have a folder with several .las files. My goal is to create a loop, in which iteratively i open a .las file, i perform some operations (which i already know they work), and then generate a new .las file, in another folder, with the same name of…
Sbobby
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Missing data when writing output .LAS file with Python Welly Library

I'm writing this post because I'm having trouble with the last step of my code: data exportation of a .las file. The code seems to work fine but when I open the written file, it happens there's no data in it, only the file header. For those who are…
J. Ignacio
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Using "lapply" in R to create multiple raster files from folder with lidar data

How can I read all files in a folder, perform a script and create separate outputs from all files containing the original name? I have a folder with .las files and I need to create corresponding .asc files from them. My script as…
Tobias Rydlinge
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