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.

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Where can I purchase private LiDAR data? [on hold]

I'm looking for privately owned LiDAR data sources. Does anyone know of companies/counties/states that sell their raw LiDAR data? I know there are free LiDAR sources out there, but I'm interested in ...
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56 views

How to find the height information from LiDAR point cloud data [duplicate]

I need to find the biophysical parameters(biomass) from the LiDAR point cloud data. For that I need the height of the trees from the data. Currently I am having the general height with respect to sea ...
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2answers
26 views

PDAL: Couldn't create filter stage of type 'filters.voxelgrid'

I have following pdal pipeline: <?xml version="1.0" encoding="UTF-8" standalone="no"?> <Pipeline version="1.0"> <Writer type="writers.pgpointcloud"> <Option ...
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5answers
127 views
+100

Where can I find raw LiDAR data for European Countries?

I'm looking for LiDAR data in laz or las format preferably from an FTP site. Does anyone know which countries have that data available to the public? From my research it doesn't seem to be easy to ...
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1answer
88 views

Merging .asc files = “The command line is too long”

Having problems merging LiDAR .asc folder files to produce a single GeoTiff file. I have followed various instructions e.g. the 2 methods of selecting input files for merging .asc files using ...
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39 views

Creating multiple LAS datasets from LiDAR files in various directories using model builder?

I have 60 folders each containing approximately 20 LiDAR files in .las format. I want to create one LAS dataset from .las files from each folder, and each LAS dataset is named by the folder name. I ...
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2answers
158 views

Are PDAL or PCL capable of producing LiDAR grid metrics?

I typically use Windows-based FUSION to generate grid metrics, which can be used to describe forest structural characteristics. From the FUSION documentation: GridMetrics computes a series of ...
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17 views

UK Environment Agency Lidar data [duplicate]

I have recently downloaded LIDAR data from the Environment Agency website in the form of asc file. In order to perform some viewshed analysis do I have to convert these files into a raster file and ...
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1answer
55 views

Open a SBET file format in GIS software

After a LiDAR flight, we can get a file containing the airplane trajectory in SBET format - Smoothed Best Estimate of Trajectory. Is it possible to open it in a GIS software like QGIS or ArcGIS? If ...
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1answer
53 views

How exactly does a single laser pulse from LiDAR act? [duplicate]

I'm trying to understand the behavior of a single laser pulse in a traditional airborne lidar. I understand that the multiple return values are representative of the surface that reflected the ...
3
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1answer
79 views

How to exclude water during contour generation?

I recently acquired a LiDAR data set that included a 1 meter DEM. I generated 1, 2 and 5m contour layers but I am seeing a lot of contours within water bodies. I suspect this is either caused by wave ...
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3answers
316 views

Thinning large LiDAR point cloud?

I have a large point cloud (LAS file) and I am trying to thin this using a complex technique. I know it is possible to thin a point cloud using simple techniques such as extracting every nth point. ...
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1answer
49 views

Average of raster elevation based on polygon boundaries

I am attempting to extract and calculate the average height of buildings using LiDAR converted to raster elevation data. I've created a DSM to cover the entire area and I am trying to extract just the ...
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1answer
46 views

Azimuth greater than 360 in Veloview (Velodyne 32)?

When I use Veloview, freezes at 1 of the frames and examine the data points, why are the azimuths greater than 360 degrees?
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1answer
41 views

Converting waveform LiDAR to discrete return format, in R?

I have an LVIS waveform LiDAR file which looks like this: head(lidar) V1 V2 V3 V4 V5 V6 V7 V8 V9 [1,] 529437.4 ...
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1answer
73 views

Creating building footprints from LAS files

I wish to create building footprints from the classification in our LAS files. I have filtered out the building points, using the point cloud filter. But I now trying to join the outermost points of ...
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1answer
104 views

Viewing point clouds in bpf format?

Is there any software that can be used to view point clouds in bpf format? My preference is for free software that has low-learning curve for quick visualizations. Currently, I convert bpf to las ...
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0answers
42 views

LiDAR doesn't work in QGIS [duplicate]

I'm having troubles to make LiDAR work in QGIS, the instructions are quiet clear and it appears in my processing dialog but when I try to run "lasview" it just doesn't do anything, not even an error, ...
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3answers
104 views

Irregular XYZ point data to raster (TIF) - LASTools alternative?

I am trying to convert my irregular spaced point data (xyz) to a DEM and then, to a raster (geotiff). Because of the irregular spacing I need a triangulation first, right (so, no spaces are in the ...
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0answers
48 views

Create a raster dataset containing the number of returns from a las file? [duplicate]

I already created DEMs, DTMs, DSMs from a LiDAR (LAS) file with a little help from the internet. However, right now I'm kind of stuck in my research. I want to create a raster file which contains ...
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3answers
178 views

Open LiDAR DEM of the UK with *.asc extension

I've downloaded a tile of a freely accessible LiDAR DEM of the UK from http://environment.data.gov.uk/ds/survey#/download. But I don't know how to open it. The files inside have the *.asc extension. ...
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1answer
65 views

Reset a base elevation in Pix4D?

Does anyone know how to set a baseline elevation in Pix4D, or is that something that has to happen on the drone-capturing side? The reason is that I have an area which is flown with LiDAR, several ...
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47 views

LasDatasetToRaster does nothing to the Raster Layer

I have been trying to figure out how to clip and rasterize a LiDAR map file programmatically (Not through arcpy) I use C# but read many languages. So far I have been able to access and assign the LASD ...
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1answer
128 views

GeoReference XYZ point cloud

I am looking for help. I have done a little bit of geo-registration of images with QGIS. But now, I have been handed some LIDAR data in PCD format (basically x,y,z), But it is not geo-referenced. I ...
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1answer
39 views

How to write a python code for Add Feature Class To Terrain using interface?

I am trying to write a code that creates a Terrain from lidar data (LAS). The problem is that the inputs are in Feature Dataset in GDB but I don't know how to write code so that using an interface. I ...
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104 views

Problem reprojecting LiDAR data using liblas

I have multiple lidar data sets and I am trying to reproject them using liblas. They are missing the coordinate system in the header information so I assign them an SRS using las2las --a_srs: las2las ...
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1answer
84 views

Using lasmerge in QGIS 2.8.3 is not working

Every time I try running lasmerge tool from LASTools within QGIS, I get the following error message: Algorithm lasmerge starting... lasmerge instance has no attribute ...
3
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1answer
120 views

Converting LAS 1.4 to 1.2

LIDAR files were released for major part of Slovenia few months back in zlas format. Decompressed LAS format is 1.4 version. I have tried many options how to generate DEMs and had some success in ...
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44 views

Las tools vs Geocue for LAS1.3 processing [closed]

I am a user of terra solid products. I have las1.3 data set which i need to perform whole processing in 1.3 version. (I need to supply WDP informtaion and classified las dataset as well. So I afraid, ...
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1answer
74 views

Deleting anomalous points in *.lasd using ArcGIS for Desktop?

I am using ArcGIS 10.3.1 for Desktop. I have a raw .las file that I have brought into an ArcGIS .lasd file format. The raw data has several anomalous points; i.e. the maximum elevation for any point ...
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57 views

TIF not showing UTM coordinates in world file

I have a lot of tif files (ortho imagery that came with Lidar data). Each tile has a .tif and .tfw but the world files (.tfw) have line 5 and 6 as numbers that aren't what I would expect as I was ...
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1answer
92 views

Reaching cm (inch) level elevation precision using drones

A road construction firm needs altitude data of road path before and after the construction and the error should be less than 3 cm (2 inch). Normally, they put a ground station and workers manually ...
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54 views

Caching LiDAR Image Service outside of ArcGIS to send to ArcGIS Server

To begin this question: I have very limited programming/coding experience and will likely need a detailed explanation if you decide to answer in that route. We are hosting a number of LiDAR services ...
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1answer
250 views

Why aren't there LiDAR records in some black and white parts of the scene?

This is the actual scene: This is the corresponding LiDAR scene: The LiDAR data is from xyz file. The questions are: Why are there no points for the dark squares on the checkerboard as well ...
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66 views

Converting raster to TIN in ArcMap 10.1 is causing crashes?

I have several tiles (~200) of Lidar 1m resolution data from Geomatics group and need to convert it to TIN format (currently in .asc) to develop a flood model. Is there a quicker way of doing this ...
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3answers
450 views

Benefits of *.las vs *.xyz or *.ascii when working with LiDAR in ArcGIS for Desktop?

From time to time, we use LiDAR data for modelling in ArcGIS. Previously, we would be supplied either an .xyz or .ascii of the data, but more recently, we are also being provided .las files in ...
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209 views

Tree counting using LiDAR data

Does anyone have any ideas on tree counting using lidar point data? I have a small set of lidar point data (plantation area about 500 hectares), from which I want to collect number of trees per ...
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2answers
73 views

Use laspy to create las file from scratch without opening an existing las file first

I have found instructions for creating a las file by opening an existing file, modifying it, then re-saving it. This re-uses the headers from the original file. But how do I create a new file from ...
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1answer
64 views

MCC-LiDAR error: version minor out of range

I am trying to use MCC-LiDAR tool, but I can't get it to work. Example, when I type: C:\>mcc-lidar -s 1 -t 1 TMR_428_63.las output_filename.las I get the following error message: Internal ...
2
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1answer
74 views

How to output points using TerraScan based on selected shape and text of block boundary

For those of you who are familiar with TerraScan, does anyone know how to save/output LAS files based on selected shape and text of block boundaries (tile index)? The TerraScan User Guide is pretty ...
2
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1answer
64 views

Integer vs Non-Integer LiDAR

A LiDAR user is telling me that his LiDAR data acquired from my organization has only integer LiDAR in certain areas. He is requesting non-integer LiDAR for those areas. First, can anyone help explain ...
2
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2answers
105 views

Identifying LiDAR tiles that are located within boundaries of AOI

I am attempting to replicate the process of creating digital elevation models from raw LiDAR data and have been provided with LAS files covering an approximate 530 square mile county area. However, I ...
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2answers
145 views

LiDAR intensity image from multiple flight lines?

I'm working with multiple raw las tiles, and I've used Fusion to create an intensity image, but it shows the flight line overlap (see below). Any idea how can I smooth the image so that the overlap is ...
2
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1answer
58 views

Using lastile in QGIS

I want to tile one large las tile into a few minor. But I just can't get it done. My original las file have around 30 million points and I want to get 6 smaller las files with 5 million points in ...
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0answers
36 views

Finding specific area with coordinates out of a lot of LAS data?

I would like to extract spatial data out of a great amount of LAS data. Unfortunately, there is no index or sth that could help me find which file is for what area. Also, it is not possible to ...
2
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2answers
193 views

Converting las files from version 1.2 to 1.3

I have lidar data set which initial waveform data is in LAS 1.3. The classified point cloud needs to be delivered in the same version, but my processing software (TerraSolid V15) allows me to write ...
3
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1answer
79 views

Is it possible to have v.in.lidar without compiling GRASS?

I already have installed libLAS like this: sudo apt-get install liblas-bin And Ì have installed GRASS GIS 7 from the ubuntugis-unstable repository. Is it possible v.in.lidar without compiling ...
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4answers
163 views

Export ground returns (.las) from classified point cloud

I have lidar data that is classified as several categories (water, ground etc.). I need to open this lidar data in some software (it will be great if it would be a open source software) and delete a ...
3
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1answer
132 views

Clip multiple .las files data to polygon shapefile using FUSION

I followed this thread in order to clip .las data based off of a polygon shapefile. However I have over 100 .las files I need to clip based off of this polygon and merged into a single .lasd file and ...
4
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1answer
181 views

Raster to vector (polygons) with generalisation

I have created rasters showing different types of vegetation (bushes, trees, open land) with help from lidar data. Now I'm looking for a method to turn these images into polygons. I'm using a Mac ...