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Finally some good news from (not so) Great Britain: The open #LiDAR data from the +Geomatics Environment Agency was used to make beautiful and intuitive maps of building heights and densities for various cities in England. You can do this easily yourself with +LAStools for your own city by height-normalizing your classified LiDAR with 'lasheight', creating a raster using either 'lasgrid' or the new spike-free algorithm available in 'las2dem', and then applying a color ramp with #GDAL or +QGIS ... (-:
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The "spike-free" algorithm for generating "better" Digital Surface Models from #LiDAR is now available for download (free access until August 4, 2016). This is joint work by +rapidlasso GmbH with Anahita Khosravipour and Andrew Skidmore from ITC Enschede / UTwente. Some of the highlights of our new "spike-free" algorithm that can generate "pit-free" DSMs and CHMs are:

(1) It takes a raw point cloud as input and produces a spike-free TIN and a corresponding raster DSM or CHM. (2) It systematically prevents the formation of spikes during the TIN construction. (3) It considers all relevant returns instead of using only the first-returns. (4) It significantly improves the accuracy of treetop detection, especially for small trees.
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Jane Meiforth - the latest participant in +rapidlasso GmbH's LASmoons program - will use our software to identify NZ Kauri trees (or Agathis australis) that are under threat by the so called Kauri dieback disease. +LAStools will be used to extract the tree crowns and describe their characteristics based on height metrics, shapes and intensity values computed from high-resolution airborne #LiDAR data (15-35 pulses / sqmtr) ... (-:
Jane Meiforth (recipient of three LASmoons) Environmental Remote Sensing and Geoinformatics University of Trier, GERMANY Background: The New Zealand Kauri trees (or Agathis australis) are under thr…
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Patricia Andrade of +CICESE is the latest participant of +rapidlasso GmbH's LASmoons program. She will analyze geomorphological processes of a near-shore landslide that occured in form of a rotational slip on 28 Dec 2013 along the Tijuana-Ensenada highway in Baja California. Patricia will be using pre- and post-event airborne #LiDAR to capture differences in the terrain as well as terrestrial LiDAR to study the characteristics of planes and lines (i.e. striations) on the footwall ... (-:

http://rapidlasso.com/2016/05/25/lasmoons-patricia-andrade/
Patricia Andrade (recipient of three LASmoons) Earth Sciences Division CICESE, MEXICO Background: The relief in the northwest coast of Baja California is subject to different processes. One process…
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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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LAStools

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Today +rapidlasso GmbH gave a presentation on behalf of the +Open Source Geospatial Foundation (OSGeo) at the Technical Meeting Open Geospatial Consortium (OGC) in Dublin. We first repeated our concern about the fragmentation in compressed #LiDAR formats and then presented on the open LAS format, on the open source LASzip compressor, on the changes in LAS 1.4, and on the features we plan for the "native extension" of #LASzip to the new LAS 1.4 point types. Here our 16 minute presentation ... 
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New QGIS #LiDAR processing toolboxes for QGIS 2.14.1 were created at the +QGIS hackfest in Girona, Spain. While everybody else was looking the other way, +rapidlasso GmbH was hacking to update the "LAStools" toolbox (single file) and "LAStools Production" toolbox (folder of files) for QGIS 2.14.1 with the latest tools and features - including 'laspublish' that uses #Potree to put your LiDAR into a any Web browser for visualization and download. The new toolbox is distributed with today's version 160606 of +LAStools ... (-:
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London Rising: Printing a 3D City Map from LiDAR
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When Andrew Godwin heard that LiDAR had become "open data" at the Environment Agency of England he downloaded the available raster Digital Elevation Model (DSM) to create a scale model of a small slice of central London. Godwin's main challende was to refine the jagged building edges into a smoother model. He "averaged out points to make a lower-detail heightmap, snapped the heights to 3m intervals and applied neighbour-based smoothing to the whole thing” Goodwin writes in his blog. Maybe creating the DSM with our spike-free algorithm would lead to less jagged but still crisp building edges ... (-:
Thus, when I finally gave in and bought a 3D printer at the start of this year, I'd had a rough project in mind for a while - to 3D print maps with actual vertical relief. Initially, I had been looking at large-scale terrain - in the style of the old raised-relief poster maps - but then a story ...
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มันมาแล้ว Geospatial 3D Printing......... back to the basic
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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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Have them in circles
205 people
Ramiya Anandakumar's profile photo
Ricardo López-Torrijos's profile photo
James Preston's profile photo
Paul Carter (IdeaLust)'s profile photo
Luc Amoureus's profile photo
Sébastien Ruelleu's profile photo
Miguel Rojas-Mendoza's profile photo
skye corbett'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.