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We at "rabbitlasso" wish all of you a Happy Easter Holiday - be it out there in the Wild Wild West, the Nebulous North, the Exciting East, or the Sweltering South - and we hope you won't require vegetation penetrating #LiDAR technology to find your eggs ... (-:
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LAStools

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At +OpenTopography Facility you can not only download tons of open #LiDAR in our compressed #LASzip format and get large #DTM or #DSM grids rasterized on-the-fly with our "Streaming TIN" technology known as #BLAST. Their servers also distribute the good old #SRTM elevation data with 90m global and 30m US resolution. Have it clipped to your area of interest and download it in your preferred file format (IMG, GeoTIFF, Arc ASCII) ... (-:
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LAStools

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PRESS RELEASE, April 1st, 2014, rapidlasso GmbH: 
+Esri and #rapidlasso are announcing to join forces and together develop a #LiDAR  compressor for LAS 1.4 in open source avoiding unnecessary format fragmentation. Their new “LASeasy” tool not only compresses but also optimizes LAS files for efficient area-of-interest queries in the cloud ... (-;
PRESS RELEASE April 1, 2014 rapidlasso GmbH, Gilching, Germany In a positive spin of events, Esri and rapidlasso are announcing to join forces and together develop a LiDAR compressor for LAS 1.4 in...
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April Fools! But our intention was not (only) to be funny. Most of the article is true. Remember, a "press release" is not a "news report" but a public relation piece written with an agenda. And our "half-true press release" certainly fits that bill. Here the truth behind the half-truth: http://tinyurl.com/truth-in-half-truth
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Maybe you have heard of #rapidlasso 's #LASmoons  program for underfunded academics and other #LiDAR  lunatics. (-: Scott Anderson of +University of Colorado Boulder's Institute of Arctic and Alpine Research uses his three lunar +LAStools months to estimate the volume of material transported by debris flows near Boulder, CO in September of 2013 after immense amounts of rain came down.
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Interactive deletion and reclassification of points was overdue and #rapidlasso  finally got their act together. Also new is viewing cross sections and moving them through the #LiDAR  point cloud for visual quality checking. The latest version (140301) of +LAStools has these improvements. A tutorial on how to use them is linked below.

Reclassify or delete point with simple intuitive operations, traverse through the ‪‎LiDAR‬ by moving cross sections with the arrow keys, store incremental and reversible (!) changes as tiny #LAY  files using the new #LASlayers  concept, store, exchange, and work with only these tiny LAY files without ever touching the much larger #LAZ  or #LAS  file, until you eventually apply the LASlayers stack of edits to produce a final LAZ‬ or LAS‬ file with all changes integrated.
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Have them in circles
105 people
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LAStools

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When #rapidlasso was in Paphos, Cyprus for the RSCy 2014 conference to hold a course on #LiDAR processing with +LAStools, we got a great demo of a drone surveilling an archaeological site during our field trip to the Roman Mosaics. These "drones" are becoming more and more present in everyday life and this is sparking some heated debates, like in Berkeley, California - LAStools' birthplace - where a "drone battle" is coming to the next City Council meeting ...
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Open LiDAR downloads via WMS: The Government of La Rioja (Spain) has integrated information about their “open LiDAR” data with a WMS server allowing their users to easily find and download #LiDAR via standard GIS clients (QGIS, gvSIG, ArcGIS …). The LiDAR holdings can also be explored with any modern Web browser through their interactive "GeoVisor" portal ...
The Geographic Information Section of the Government of La Rioja in Spain has integrated information about their "open LiDAR" data with a WMS server allowing their users to easily find and download...
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Open Like a Venus Flytrap ... ESRI's LAZ clone. ESRI created vendor lock-in controversy in the #LiDAR world with their LAZ clone. Shortly after their proprietary LAS compressor was made available, I did reach out to the #ESRI management team. After all it was Martin Luther King weekend and in MLK's spirit that "We must accept finite disappointment, but never lose infinite hope" I made one final attempt to avoid LiDAR format fragmentation. I suggested to those who had been directing the #LAZ cloning efforts to join forces and jointly develop an open standard for the new LAS 1.4 point types. But as the evil empire instead continues to ramp up their clone production, we shall ready our LiDAR sabers ... (-;
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Interesting post by +Darren Wiens, a GIS Analyst in British Columbia, Canada who describes how to use #LiDAR  to find sunny spots in a residential area using +LAStools and #ArcGIS . This is useful for installing solar panels, planting tomatoes, and placing your garden patio. Would be cool if someone could describe how to replicate this work flow in +Quantum GIS using the corresponding GRASS or SAGA module for the solar radiation computation instead of the "darn expensive" Spatial Analyst tool from +Esri ... (-:
Here's a quick method for finding the sunniest spot on your property in Prince George, BC (and elsewhere if you can find the data). Unfortunately, this method is not free from start to finish (it r...
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LAStools

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What has happened to +LAStools iconic "fusa.laz" test #LiDAR  data set? Has some kind of triangle monster gotten the better of these points? Is this that proprietary side-effect of ESRI's attempts to clone the #LAZ‬  format in their evil labs in Switzerland that the scientists have long warned us about ...? Or maybe a sign that #rapidlasso  has developped a simple cure for some point cloud ailments in their "secret (beach) labs" in the Philippines ...? (-;
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Have them in circles
105 people
Bartłomiej Jan Janus's profile photo
Alan DeRossett's profile photo
aryo andriyanto's profile photo
Antonio Morales's profile photo
ALE L G's profile photo
Matthew Yager's profile photo
Arne Fjellro Løitegård's profile photo
Darío Peña Pascual's profile photo
Martiño Xosé Vázquez Mato'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.