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Wow! Comparing pre- and post-earthquake #LiDAR shows how the earth has moved. Not the image below but the animated GIF illustrates the displacement that has happened due to the Kumamoto earthquake. Explanations are only in Japanese, but the aforementioned animated GIF can be found here: http://www.ajiko.co.jp/article/detail/ID56JI45Y2D/
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Fixing Intensity Differences between LiDAR Flightlines
We sometimes come across #LiDAR  flightlines whose returns have intensity values that are drastically different than those of other flightlines. Using intensity rasters with dark strips as input for land cover classification may likely make things worse. Radiometrically “correct” intensity calibration is a complex topic. We here describe a “quick and dirty” fix using +LAStools to the situation shown below so that average intensity rasters at least “look” sensible ... (-:
Visiting our users on-site, such as last week at Mariano Marcos State University in Ilocos Norte in the Philippines, we sometimes come across situations as pictured below where the intensity values…
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Just in time for ILMF 2016 +rapidlasso GmbH is happy to annouce the latest addition to their  #LiDAR‬  processing software +LAStools. The new ‘laspublish‘ creates stand-alone Web Portals for interactive 3D viewing of LiDAR points and for selective downloading of #‎LAZ‬  or #LAS‬  files. The new tool is based on the cutting-edge streaming point cloud viewing technology of #Potree‬  that optimizes large LiDAR point clouds for the Web such that anyone can visualize, explore, and (optionally) download them with any modern browser ... (-: ...  #ILMF16  
PRESS RELEASE (for immediate release) February 18, 2016 rapidlasso GmbH, Gilching, Germany Just in time for ILMF 2016, the makers of the open LASzip LiDAR compressor annouce the latest addition to ...
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Forget everything that your professor, GIS textbook, or #LiDAR  manual has told you about the use of first returns for DSM and CHM construction. We at +rapidlasso GmbH are happy to present the first do-it-youself instructions for generating spike-free Digital Surface Models based on the new algorithm from Khosravipour et al. (2015, 2016). A prototype is now available in +LAStools so you can generate "spike-free" TINs for your own data ... (-;

http://rapidlasso.com/2016/02/03/generating-spike-free-digital-surface-models-from-lidar/
A Digital Surface Model (DSM) represents the elevation of the landscape including all vegetation and man-made objects. An easy way to generate a DSM raster from LiDAR is to use the highest elevatio...
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Here is an increasingly common situation: All your awesome #LiDAR  files are in LAS 1.2 format but - darn - the tender specification document of your client explicitly requests the data delivery to be in the latest LAS 1.4 format. The free and open source las2las module of +LAStools – also known as the Swiss Army knife of LiDAR processing – can easily up-convert them. Here is how ... (-:
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http://rapidlasso.com/2016/01/10/create-proper-las-1-4-files-with-lastools-for-free/
So your LiDAR processing workflow produces beautiful LAS or LAZ output. You think the files are nothing short of perfect. But they are in LAS 1.2 format and the tender document explicitly requests ...
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Apparently, Illinois has a problem with mosquitoes. Since 2003 there have been 1,263 confirmed human infections with the mosquito-borne West Nile virus. Geoffrey will be using his three #LASmoons  to determine what spatial factors correlate with the distribution of mosquito species in Bloomington-Normal, Illinois. He will use +LAStools to generate pit-free CHMs and extract building footprints from 509 square kilometres of #LiDAR  data.
Geoffrey Ower (recipient of three LASmoons) School of Biological Sciences Illinois State University, Normal, USA Background: The spatial distribution and abundance of mosquitoes is important becaus...
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LAStools

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The newest participant in "LASmoons - free licenses for poor #LiDAR lunatics" will try to detect temporal changes in two river beds as part of the EU LIFE programme. Frequent UAV flights are carried out in both areas collecting to high-resolution imagery. Structure from Motion photogrammetry enables the creation of high-density point clouds. A full LAStools processing chain will be developed with particular attention to the extraction of ground points underneath vegetation under leaf-on / leaf-off conditions. Ground points will be interpolated to generate raster DTMs. The quality will be checked against an ALS-acquired DTM ... (-:
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http://rapidlasso.com/2016/04/23/lasmoons-jakob-iglhaut/
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Jakob Iglhaut (recipient of three LASmoons) Program for Geospatial Information Management Carinthia University of Applied Sciences, Villach, AUSTRIA Background: As part of the EU LIFE programme two…
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England opens raw #LiDAR  points for free download.

It is finally happening! The Environment Agency - that had already wooed the open data movement last year by distributing DTM and DSM rasters of up to 25 cm resolution for most of England - started to also distribute their raw LiDAR point cloud archives. Yesterday the Environment Agency announced on their blog that the first chunk of LASzip compressed LAZ files went online. It contains around 16,600 square kilometers of survey data that was captured between July 2014 and November 2015, equivalent to 10 times the size of greater London. The remainder of their point cloud archive, for surveys going as far back as 2005, will be released by the end of June 2016. Long live the Queen ... (-:

Germany, Poland, France, Czech Republic, Austria, Norway, Sweden, ... are becoming increasingly uncool ... geospatially speaking ... as more European nations are embracing open data. When will they follow the great open data example that Finland, Holland, Denmark, Spain, England and others are setting? Stop holding our LiDAR hostage!!! You used our taxes to pay for that data ...
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We at +rapidlasso GmbH will not attend ILMF 2016 in Denver this year. Instead we will continue to code the “native LAS 1.4 extension” of the LASzip #LiDAR  compressor at the OSGeo code sprint in Paris. Quite a number of core point cloud developers will be coming to France this year. Check the Wiki to see who is coming and maybe consider a last-minute sponsorship. Given that the logo contains a "laser chicken" it should not come as a surprise that +LAStools is a sponsor too ... (-:
Purpose. Bring together project members to make decisions and tackle larger geospatial problems as in previous years: Philadelphia (2015); Vienna (2014); Boston (2013); Island Wood (Seattle) (2012); Montreal (2011); New York City (2010); Toronto (2009) ...
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The latest   #LASmoons  study will use +LAStools to first estimate the current number of trees and extract tree metrics such as volume, canopy cover and densities with the use of the national #LiDAR dataset of Denmark and NIR ortophotos from summer and spring for the city of Copenhagen. These canopy metrics will subsequently be used to inform a simple tree model which will be implemented in a 2-D overland flow model to assess the effect of trees on flood mitigation ...
Andreas Konring and Susanne Bjerg Petersen (recipients of three LASmoons) Department of Environmental Engineering Technical University of Denmark, Lyngby, DENMARK Background: Copenhagen has in the ...
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Top Ten #rapidlasso  blog posts on #LiDAR  of  2015:

Our toolboxes have continued their popularity. The top two spots in terms of number of page views over the course of 2015 are two blog posts from 2013 with the installation instructions for the QGIS and the ArcGIS toolboxes. How to implement the pit-free CHM algorithm of (Khosravipour et al. 2014) with LAStools came in a close third. The most clicked article written in 2015 is in fourth place: It was about the "LAZ clone" controversy that continues to disrupt harmony in the LiDAR community. Other hot topics of 2015 were DTM generation from dense matching points and the Open Data release by England. Below the complete top ten:

(1) http://rapidlasso.com/2013/09/29/how-to-install-lastools-toolbox-in-qgis/
(2) http://rapidlasso.com/2013/07/02/arcgis-lastools-toolbox-for-lidar-processing/
(3) http://rapidlasso.com/2014/11/04/rasterizing-perfect-canopy-height-models-from-lidar/
(4) http://rapidlasso.com/2015/02/22/lidar-las-asprs-esri-and-the-laz-clone/
(5) http://rapidlasso.com/2013/10/13/tutorial-lidar-preparation/
(6) http://rapidlasso.com/2014/06/13/dtm-from-dense-matching-points/
(7) http://rapidlasso.com/2014/09/02/six-new-video-tutorials-on-lastools/
(8) http://rapidlasso.com/2015/09/21/creating-dtms-from-dense-matched-points-of-uav-imagery-from-senseflys-ebee/
(9) http://rapidlasso.com/2015/09/02/england-releases-national-lidar-dem-with-insane-vertical-resolution/
(10) http://rapidlasso.com/2014/11/06/keeping-esri-honest/
What is part of the LAStools distribution? Cross-sections and editing points with lasview Overview of LAStools capabilities Details on different LAStools modules LAStools Pipelines as ArcGIS and QG...
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Did you know that #rapidlasso  has added a secret function to +LAStools that allows you to decorate your #LiDAR  Christmas tree? Happy Holidays!

http://www.facebook.com/LAStools/photos/1015526351843142
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In their circles
210 people
Have them in circles
201 people
jean piero sanchez's profile photo
pierluigi de rosa's profile photo
Roger Diercks's profile photo
Felipe Vaca's profile photo
Sébastien Ruelleu's profile photo
Catarina Rodrigo's profile photo
David Hartman's profile photo
Irfan Akhtar Iqbal's profile photo
Hamish Anderson's profile photo
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efficient tools for LiDAR processing
Introduction
LAStools are a collection of highly-efficient, scriptable tools (optional with GUI) for multi-core batching that process LAS, compressed LAZ, Terrasolid BIN, ESRI Shapefiles, and ASCII in an extremely fast manner:

* lasground.exe extracts bare-earth by classifying ground points
* lasclassify.exe find buildings and the trees above the ground
* lasgrid.exe rasters large LAS files into elevation/intensity grids
* lasboundary.exe extracts an enclosing polygon of the points
* lasheight.exe computes the height of each point above ground
* lasclip.exe clips points against building footprints / flight swaths
* lastile.exe tiles huge amounts of LAS points into square tiles
* txt2las.exe converts LiDAR from ASCII text to binary LAS
* las2txt.exe turns LAS into human-readable easy-to-parse ASCII
* lassplit.exe splits points of LAS files into flight lines
* and more ...

Our powerful, lossless LiDAR compressor laszip.exe turns large LAS files into much smaller LAZ files that are only 7 - 20 percent of the original file size.