Questions tagged [lidar]
LIDAR (Light Detection and Ranging or Laser Imaging, Detection and Ranging) is an active optical remote sensing technology that measures properties of scattered light to find range and/or other information of a distant target.
946 questions
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Using drop_duplicates and filtering for Withheld_flag in lasR
I'm working on creating a pipeline for lasR (0.17.4) in R (4.5.2) to clean and classify LiDAR. My pipeline is supposed to read in a LAScatalog, filter for duplicates, classify noise using IVF, delete ...
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PDAL: open stream for ' ' with error 'No error'
I'm trying to run a pdal pipeline - which has worked before (on a different computer, different data around 3 years ago) - on a singular las dataset - however it keeps throwing up an error: PDAL: ...
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Creating mask for raster from digitized polygons in QGIS
I have derived a rough habitat/vegetation classification raster from first-return and last-return LiDAR data.
I would like to exclude the buildings that are present in the area, so I digitised them ...
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DJI L2 LiDAR produces point with elevation change across flight path
I am trying to collect and process point cloud data with a DJI L2 LiDAR system with point cloud processing in DJI Terra v4. While I am experienced with drone-based photogrammetry this LiDAR system ...
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Addressing inconsistent offsets and overlapping in LiDAR data using lidR
I'm a novice to LiDAR who's currently attempting to rasterize groups of point cloud tiles (downloaded from the USGS) into DTMs using lidR. When I load a group of tiles into a LAScatalog and run ...
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Iterating through Folder of zipfiles to process LiDAR data in FME
I have an FME Form project that reads from a zipfile containing a LAS file and outputs the slope in a Mapinfo TAB format.
It works fine by itself but I need to run it over many zip files. I am trying ...
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Providing bounding box for lidR to find trees
I have a laz file and working with lidR for tree detection and segmentation. So far, My workflow is like this:
import and clip laz file (already has ground points classified)
las12_mot <- ...
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LiDAR data classification using Global Mapper ground misclassification
I have been using automatic classification using LiDAR and in this case while trying to do the same only patches of the ground were classified. How do I classify section with pools of water and ...
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Skip LAS files in PDAL Pipeline from directory conditionally
I want to use a PDAL pipeline to process a directory of .las files via a couple stages. My pseudocode / general workflow is this:
Filter to ground and canopy classifications (specifically a custom-...
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Removing trees and buildings from LiDAR point cloud
I'm trying to get some LiDAR data to only show the ground. I can classify and remove the buildings in CloudCompare, but I get holes where they used to be.
Can I get the ground without holes?
I am new ...
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Classified or unclassified .las file (LiDAR) use when attempting to make a Canopy Height model for an area of mixed land cover type
I have both unclassified (raw, untouched points from GNSS, IMU, and the laser sensor without any classification) and classified (points that are categorized into different classes (e.g., bare earth, ...
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Gap between tiles from lidR LAScatalog
I am processing LiDAR tiles using a LAScatalog from the lidR package in R. When I specify a raster template for the res argument in pixel_metrics, there is a one-pixel gap between the raster tile ...
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Displaying units of slope information
Dipping my toes in LiDAR, DEM and slope calculations, and making some progress, though this is at the edge of my experience level.
I have the LiDAR, contours and have run the slope calculation, but I ...
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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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Find individual tree locations from LiDAR data [closed]
I am looking to extract individual trees from the UK's LiDAR vegetation dataset. How can this be done?
