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Questions tagged [lastools]

Software for LiDAR processing tools.

1
vote
1answer
25 views

Retrieve the elevation from a point cloud with lastools?

I have a general question about how can I get the elevation (z) data from a pointcloud (las) along a trajectory. I have a shape file with x, y coordinates and I have the related .las files. And I am ...
2
votes
2answers
209 views

Using LAStools to repair headers for several LiDAR files?

So, I have 21 LiDAR files with incorrect information in their file headers. For example, when I import a single file into R using the following code, I get several warnings saying that there are no ...
1
vote
1answer
446 views

LAStools plugin in QGIS: ''The system cannot find the path specified."

I'm attempting to convert LAS files to a multipoint file using QGIS methods. I've found some documentation that suggests that v3.2 and up has LAStools available as a plugin so I downloaded the latest ...
9
votes
3answers
317 views

Difference between LAStools, libLAS and PDAL?

After many readings, I'm still confused about the difference of use and the aims of the following tools for LiDAR data processing and manipulation: LAStools, libLAS, and PDAL. My understanding so far ...
1
vote
3answers
129 views

Maximum number of returns per laser pulse in airborne LiDAR?

What is the maximum amount of returns a discrete aerial laser scanner is capable of recording? For example in a LAS 1.2 metadata under Point Data Records there is the category 'Number of Returns' ...
1
vote
0answers
51 views

Downloading LASTools on Windows 10, QGIS 2.18.24 - Error Message [duplicate]

Following the instructions on this page; How to install LAStools toolbox in QGIS I came across this error when I tried to define the path to my LASTools folder in the QGIS Processing Toolbox Menu [C:\...
2
votes
1answer
191 views

Choosing LiDAR tiles with vector data using LAStools?

So the problem is that I have a huge amount of LiDAR tiles (in .laz format), but need only part of them that are within the borders of the city. When I load all the tiles to LASTools, I have ...
1
vote
2answers
311 views

Failed to install Potree on Ubuntu 18.04 Bionic

I am trying to install Potree on my computer and I am stuck. I am following these instructions: $ sudo apt-get install python-software-properties git $ sudo apt-get install build-essential cmake g++ $...
0
votes
0answers
64 views

Projection problem shapefile / layer created with LAS tools [duplicate]

I am a beginner with QGIS and I have been working on creating layers with LAStools and shapefiles of the city of Rio de Janeiro. Both data are provided by the city, so shouldn't contain any error. My ...
2
votes
1answer
385 views

Converting DEM to LAS file? [duplicate]

Is there a way to convert a DEM raster to a .las file using open source software and/or any tools that come along with a complete ESRI license? I have been able to achieve this using the LAS Toolset ...
0
votes
1answer
55 views

access r.in.lidar through pyGIS console [duplicate]

How can I access the r.in.lidar algo with the pyqgis console? i tried to import processing and algolist but r.in.liad under the GRASS GIS algo does not get listed. Also Checked the options iunder ...
7
votes
2answers
4k views

Installing LAStools in QGIS 3.0?

I don't know how to install LAStools in QGIS 3.0. In QGIS 2.18, you can incorporate it as a provider in Processing -> Options-> Tools for LiDAR data (for example: Installing LAStools in QGIS 2.4?). ...
2
votes
1answer
896 views

Converting LiDAR .las to .xyz with LAStools outputs incorrect projected coordinates?

I have an application that can import terrain data in an XYZ text format where X = latitude, Y = longitude and Z = elevation. I am trying to convert a LiDAR .las file to this format using las2las. ...
2
votes
2answers
315 views

LAStools menu seems to be incomplete in QGIS?

I am using QGIS 2.18.2 Las Palmas on a MacBook Pro running OSX 10.13.1 High Sierra. I followed Martin Isenburg's instructions how to install LAStools toolbox in QGIS and the LAStools menu is available ...
1
vote
1answer
410 views

Classifying LiDAR data to mid vegetation using LAStools?

I want to classify LiDAR vegetation points in low and mid vegetation, using LAStools. High vegetation is simple to get, using top of canopy (first return), but how about low vegetation, and mid? ...
2
votes
0answers
331 views

LAStools errors in QGIS: 'cannot open lasreaderlas with file name .las', 'could not open lasreader'? [closed]

I am experiencing some problems with LAStools. I have two QGIS separate installations: 2.14.17 is a standalone installation and 2.18.11 is a Osgeo4w installation. I have followed the procedure to ...
-2
votes
1answer
485 views

Seeking open source alternative of Las Tools [duplicate]

I am finding any open source alternative of Las tools , i Google but i found las Utitly which is also not the Open source alternative But i want open source alternative of Las Tools,
2
votes
1answer
363 views

Using Python to send arguments to LAStools basics

I'm currently trying to develop a LAStools specific routine, setting all the parameters for lasheight then using the output of that to run lasclassify. The closest thing I've found to being able to ...
2
votes
3answers
482 views

Creating DEM from multiple .las files using LAStools in ArcMap?

I am attempting to create a DEM for a raster large dataset, with over 500 .las files. Within the las2dem tool, within the LAStools toolbox there is not an option to select an entire folder, nor can ...
1
vote
1answer
773 views

LASTools' lasview gives no output in QGIS? [closed]

I've downloaded the latest LASTools into the current folder in QGIS and have tried running lasview on a few .las files I have on hand. As far as I can tell the files are georeferenced but I am not ...
1
vote
0answers
78 views

How to extract and export “raised field” LIDAR objects?

I'm working on Windows 10. In input, I have a .LAS "GROUND_only" LIDAR point cloud (4 millions points). We're interested in geomorphological microstructures called raised field (ground elevation due ...
2
votes
1answer
734 views

Is there any documentation on how to change the user interface of Potree?

Has anyone found or created any information regarding the different user interfaces of Potree? I have created LiDAR portals using the LAStools laspublish tool to create Potree sites, but cannot see ...
1
vote
1answer
423 views

Using ModelBuilder to iterate through LAS files using custom LASToolbox?

I'm trying to use ModelBuilder to iterate through a folder containing 25 usgs .las files and run 4 custom geoprocessing tools from the LAStools toolbox available on github. I am able to successfully ...
4
votes
2answers
885 views

Manually editing a LiDAR cloud to remove non ground points

I've recently been tasked with cleaning up a LiDAR file of a river where I need to remove trees, shrubs and power lines that run right across the river. I was looking into LAStools but it has a limit ...
1
vote
1answer
859 views

Keeping only ground points (class 2) with lasground in QGIS 2.14?

I want to keep only the LiDAR ground points in a las file, using the lasground tool from LAStools within QGIS. In QGIS Chugiak (2.4) there used to be an option to "keep class 2", but I don't know how ...
1
vote
1answer
2k views

Merging multiple las files? [closed]

I want to merge 10 las files into one, and I am having problems with lasmerge of lastools. It isn't able to deal with such a high number of points (average of points per file almost 4 million of ...
1
vote
2answers
347 views

Can't normalize LiDAR point cloud with lasheight and -replace z (LAStools)

When I try to use lasheight with -replace z to normalize the point cloud, the height of points are changed (destroyed heights; see pictures below). Without using -replace z everything is ok, but the ...
1
vote
1answer
241 views

Filtering LiDAR data with las2las by scan angle range?

I am using las2las to filter .las data and I would like to filter the data between a scan angle of -15:+15; however the algorithm tells me the following: ? error bad lexical cast: source type value ...
1
vote
1answer
450 views

Batch processing las files with LASzip from QGIS?

I am using QGIS 2.16 version. I added LAStools plugin and executed batch process, in a way that I have to write each filename in the output field. Is there any automatic process to get outputs with ...
0
votes
1answer
387 views

Finding lasview tool from LAStools within QGIS?

I am trying to make a DEM from a .las file. I have installed the LAStools directory and have the plugin: I am wanting to use the lasview algorithm, but I can't see it in the standard toolbox I ...
11
votes
7answers
11k views

QGIS 2.14.1 LAStools install error: “wrong value for parameter 'Msys folder'…”

I went to step 4 from How to install LAStools toolbox in QGIS guide and extracted LAStools to my C drive and just made the folder there. I can't do step 8 because it seems to already be in "advanced ...
5
votes
1answer
945 views

Sending arguments to LAStools function from Python script not working

I`m trying to call the lasground module from a python script, using this method: args=['lasground', '-i *.las', output_file, arg_step, arg_spike, arg_spikedown, arg_offset, arg_bulge, arg_cores] proc=...
1
vote
1answer
911 views

LAStools in QGIS error at activation: “wrong value for parameter 'OTB applications folder'…”

I have a problem with LAStools in QGIS 2.14. I've followed the LAStools instructions for downloading LAStools for QGIS. ` I replaced 'lidar' folder in C:\OSGeo4W64\apps\qgis\python\plugins\processing\...
4
votes
1answer
677 views

Importing LAS files in QGIS with LAStools gives an 'ascii encode error'

I'm new to QGIS environment and I am trying to load LAS files into QGIS with lasground but when I run the following process an error occurs: 'ascii' codec can't encode character u'\u0105' in ...
2
votes
1answer
423 views

Finding the origin in .laz file with LAStools

I obtained a .laz file, which I used lasinfo and las2txt to view the records. Scale Factor X Y Z: 0.00100000000000 0.00100000000000 0.00100000000000 Offset X Y Z: 22717....
2
votes
0answers
104 views

LAStools in QGIS 2.8.5: “missing dependency. lastools folder is not configured” [duplicate]

I am using QGIS 2.8.5 Wien and I am trying to install LAStools toolbox. I followed the instructions in rapidlasso.com to install it. I did everything said on the link, but when I tried to run it, it ...
3
votes
0answers
171 views

QGIS 2.12 LAStools lasmerge error: “no outputs specified” [closed]

I am trying to merge 4 .las files with "lasmerge" within "LAStools" in QGIS 2.12 running Windows 7 64. I keep on geting error "no outputs specified" even thoug i did specify the output folder and ...
1
vote
1answer
290 views

Using lasmerge in QGIS 2.8.3 is not working: “…instance has no attribute”

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 '...
2
votes
1answer
569 views

Merging more than 9 input files with lasmerge?

Is there a possibility to feed more than 9 LAS files to lasmerge tool? The user interface only allows 9 LAS files from LAStools toolboxes in QGIS or ArcGIS, but at liblas.org it’s described as there ...
1
vote
1answer
125 views

LAStools blast2dem: error writing data for field “StripOffsets”

I was processing an overage file to generate DTM and DSM using blast2dem. The generated DTM file can be viewed using ArcMap and ENVI. However, ArcMap and ENVI cannot open the generated DSM file. I don'...
2
votes
1answer
111 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 ...
0
votes
1answer
142 views

LAStools (3D Analyst) scale factor application

I'm trying to use the las2las (transform) module from the LASTools toolset to apply a scale factor to an LAS dataset. The problem is that the client wants us to apply the scale factor from a known XY ...
2
votes
3answers
1k views

Running LAStools on QGIS 2.8: “missing dependency. lastools folder is not configured”

To be honest I'm not sure how to run LAStools from within QGIS 2.8. I'm trying to learn by experimentation. QGIS shows all the LAStools in the toolbox If I double click on a LAStool in the toolbox I ...
2
votes
2answers
2k views

Coordinate transformation in LAStools?

LAStools program only limited to UTM platform for coordinate transformation (las2project, las2transform). Is there any other ways to transform coordinate for local projection in LAStools? For example ...
3
votes
3answers
1k views

Removing las2dem streaks from raster DEM?

I've created a series of DEM files using the las2dem tool from LAStools; however since I don't have a licensed version they have black streaks running across them. Does anyone know a good method for ...
3
votes
2answers
2k views

wine + LAStools in QGIS 2.8.1, Ubuntu 14.04

I can't get wine + LAStools to work in QGIS 2.8.1 (ubuntu 14.04). I only get the 22 open source functions that comes with QGIS. Outside qgis wine + LAStools works fine. My guess is that I am not ...
1
vote
2answers
3k views

Create DEM with 1 foot contours from lidar data with 1.4 meter resolution [duplicate]

I have Lidar data which contains multiple .las files for an entire quad. I have figured out which .las is the area I am looking for. I was told the data is in 1.4 meter resolution and would work to ...
2
votes
3answers
2k views

Using LAStools in QGIS gives “global name 'os' is not defined”?

I have a problem with LAStools in QGIS 2.6.1. I have never used QGIS to process LiDAR data before. I downloaded LAStools yesterday from the rapidlasso GmbH website. I unzipped the “lastools.zip” ...
2
votes
2answers
441 views

Using python to batch process lasclip - LAStools/QGIS

I am trying to use the python console to batch quite a few processes from lastools. I'm having trouble with the arguments to lasclip. clipped_las = processing.runalg('lidartools:lasclip', True, ...
4
votes
2answers
3k views

Clipping from a tiled LAS dataset with LASTools (for ArcGIS)

I have huge amounts of lidar data stored as tiled datasets per project. The "tiles" are separate LAS files based on our national map sheet setup (800 by 600 meter). To keep an overview of the data I ...