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Questions tagged [lidar]

LIDAR (Light Detection And Ranging) is an optical remote sensing technology that measures properties of scattered light to find range and/or other information of a distant target.

If the question is not solely about programming it might be suitable on gis.stackexchange.com

Programming questions related to lidar geospatial data are also welcome on GIS SE.

429 questions
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Noise removel in laidar data

I have a Lidar data in .las file and i want to remove Noise from IT ? is this is possible in open sources tools i.e las tool ,LibLas or any other open source , Because my finding are we can achieve this in point cloud library using .pcd file…
ahmad735
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How to render point cloud data in browser with iTowns2

I am attempting to use iTowns2 (https://github.com/iTowns/itowns2) to visualize point cloud data in the browser. According to the README: "[iTowns'] first purpose was the visualisation of street view images and terrestrial lidar point cloud." From…
currenthandle
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Function readLAS not found

In spite of having the packages "rLiDAR" and "lidR" already installed in my computer, and having R Studio updated, when I use the function readLAS(), it doesn´t work. What could be the problem? My line of code:…
Ric_02
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How to generate 3D point cloud from Lidar range data

I have a set of videos that were captured by a lidar. My data is raw, meaning that each video file contains range and intensity (gray scale) data. Now, I want to create 3D point cloud from range data. Based on what I read, the Lidar data that I have…
Miranda
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Best way to compile LASlib to dynamic library

I want to compile LASlib to dll. This library is stored in github. Normally, LASlib are compiled to static library. I made instruction for library compilation in Visual Studio 2015 and static library was compiled successful. But this way isn't good…
Lisek
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I'm trying to detect a square using Point cloud library. I have pcl data from a 3D lidar in which I need to find squares

I'm trying to detect squares using Point cloud library. I have pcl data from a 3D lidar in which I need to find squares. Ransac doesn't have a model for square. I wish to know what can be the most efficient method for square detection.
sudhakar goyal
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Detect tree height and crown width in numpy array

I have a 3D-LiDAR pointcoud repesenting a tree loaded into python with the laspy package. It is now stored as a numpy array. My purpose is to calculate the height of the tree by finding the point with the highest z-value and calculate the distance…
Bob
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Table is not being displayed in the mainPanel's tabs - Shiny

I'm trying to display a table in the Main Panel but nothing appears and I don't get any error message, it's just blank. I'd widely appreciate if anyone could help me solving this. Thanks in advance! ui.R shinyUI(fluidPage( …
Iasmim Louriene
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How to insert a function from another package in the server.R - Shiny?

I'm trying to insert a table on Shiny that is gonna be generated from a rLiDAR function. However, I'm having trouble to figure out how to insert this function in server.R. Here's what I was trying to do: output$summary <- renderTable({ table…
Iasmim Louriene
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C++ 3D Array LiDAR Data

I have a comp-sci project at university that has me somewhat stumped. 1[Project Link]This link will take you to the website, and the project is the PDF called "LiDAR Data and 3D arrays". The basic premise of the project is to be able to read and…
user6126318
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How to make a las clip (lidar data)

I am trying to clip a lidar data in a circle polygon of 0.5 mile but it's not working. I used the las tool "las clip" but it doesn't give me an resultant file. Does anyone know how to make a las clip?
Iasmim Louriene
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Valueerror when saving with laspy

I try to make this code to open LAS files make a change and then save the result in a new LAS file. The las file contains points which have coordinates (X and Y) and values (like Z for elevation). I have this almost working code. The only thing is…
Gary
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Arduino - Linux - URG Library

I have a couple questions regarding Arduino (Mega), Linux and how to load URG library. So I am using Ubuntu Linux, version 13.04 (I believe), for a project and I downloaded the Arduino Software for Linux. I added the Sabertooth library for Linux…
Raffael Rabelo
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3D alpha shape yielding unexpected convex hull of surface

I executed the 3D alpha shape function with CGAL and I got unexpected results. My input data was a set of 3D points (x, y, z) that represents one building (box) in a flat area (with some noise in the coordinates - small ones). I supposed I would get…
ricãO
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Lastools error: version major out of range

I run lasinfo with a .las file and get the following error message. $ lasinfo a.las error: version major out of range I wonder what is the reason and how can I resolve it ?
Frank gu
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