Automated Urban Feature Extraction

This research paper claims 92% accuracy for their method of extracting urban objects from mobile lidar data. The proposed method generates multi-scale supervoxels from 3D point clouds using the point attributes (e.g., colors, intensities) and spatial distances between points, and then segments the supervoxels rather than individual points by combining graph based segmentation with multiple cues (e.g., principal direction, colors) of the supervoxels.

The proposed method defines a set of rules for merging segments into meaningful units according to types of urban objects and forms the semantic knowledge of urban objects for the classification of objects

Posted in Mobile LiDAR, Research, Software | Leave a comment

Using Lidar to Determine Forest Biomass

This is an important overview of the research being done by Kim Calders in Australia to determine the biomass of trees using 3D laser scanning.

Kim worked together with a number of international colleagues and published the results of the study in the scientific journal Methods in Ecology and Evolution.“We have proved in Australia that the method works. Terrestrial laser scanning is an active remote sensing technique that can measure precise distances by sending out laser energy and then analysing the reflected energy. The instrument used in this work is a laser scanner that is positioned below canopy. Whereas  the error increases for trees with larger diameters using the current methods, this is not the case with this new method.”

 

Posted in Environmental, Forestry | Leave a comment

Point Cloud Linked to Asset Database

It’s a short video, but it shows the ability to  link an asset database to the point cloud in EcoDomus. The company is pioneering the use of BIM for facility management and beyond.

It is also promoting the use of COBie. COBie (Construction Operations Building information exchange) is a vendor-neutral industry standard that describes both the deliverable (COBie file) and the process of collecting and validating building lifecycle data during design, construction and commissioning. This data can be incorporated into the Operation & Maintenance phase of a building lifecycle efficiently.

This deserves a close look for those interested in lifecycle asset management.

Posted in Data, Software | Leave a comment

Lidar Used to Discover Ancient Goldmines

laserfromapl

As reported in Phys.org Las Médulas in León is considered to be the largest opencast goldmine of the Roman Empire, but the search for this metal extended many kilometres further south-east to the Erica river valley. Thanks to a Light Detection and Ranging (LiDAR) laser system attached to an aircraft, the ancient mining works of the area and the complex hydraulics system used by the Romans in the 1st century BC to extract gold (including channels, reservoirs and a double river diversion) have been discovered.

 

Las Médulas in León is considered to be the largest opencast goldmine of the Roman Empire, but the search for this metal extended many kilometres further south-east to the Erica river valley. Thanks to a Light Detection and Ranging (LiDAR) laser system attached to an aircraft, the ancient mining works of the area and the complex hydraulics system used by the Romans in the 1st century BC to extract gold (including channels, reservoirs and a double river diversion) have been discovered.Read more at: http://phys.org/news/2014-11-laser-plane-roman-goldmines-spain.html#jCp

Las Médulas in León is considered to be the largest opencast goldmine of the Roman Empire, but the search for this metal extended many kilometres further south-east to the Erica river valley. Thanks to a Light Detection and Ranging (LiDAR) laser system attached to an aircraft, the ancient mining works of the area and the complex hydraulics system used by the Romans in the 1st century BC to extract gold (including channels, reservoirs and a double river diversion) have been discovered.Read more at: http://phys.org/news/2014-11-laser-plane-roman-goldmines-spain.html#jCp

Las Médulas in León is considered to be the largest opencast goldmine of the Roman Empire, but the search for this metal extended many kilometres further south-east to the Erica river valley. Thanks to a Light Detection and Ranging (LiDAR) laser system attached to an aircraft, the ancient mining works of the area and the complex hydraulics system used by the Romans in the 1st century BC to extract gold (including channels, reservoirs and a double river diversion) have been discovered.Read more at: http://phys.org/news/2014-11-laser-plane-roman-goldmines-spain.html#jCp

Posted in airborne LiDAR, cultural heritage, Historic Preservation, Mapping | Leave a comment

NASA GEDI Lidar

To be honest I wasn’t sure if I had previously blogged about GEDI, the Global Ecosystems Dynamic Investigation lidar sensor project that NASA is proposing for the International Space Station so I did a search on my posts. The results indicated that NASA is doing a lot of lidar research.

In this case the goal is to create detailed 3D maps and measure the biomass of forests.

“GEDI lidar will have a tremendous impact on our ability to monitor forest degradation, adding to the critical data needed to mitigate the effects of climate change,” Patrick O’Shea, chief research officer at the University of Maryland, said in a statement.

Posted in Forestry, Government, remote sensing, Research | 2 Comments

USIBD is Sponsoring Hardware Survey

The USIBD (U.S. Institute of Building Documentation) is sponsoring a survey that will form the basis for their fifth Cornerstone Report. The focus this time will be on hardware.

The survey applies to all those who are associated with the industry of documenting buildings. Those of you who contribute to this survey are eligible to receive a copy of the Cornerstone Report, whether you are a member of the USIBD or not.  Please find the directions at the end of the survey to sign up to receive it.

Please take a few minutes to provide your input.

Posted in Orgs, Research, Sensors, Technology, The Industry | Leave a comment

Lidar News eNewsletter

The latest edition of the eNewsletter is on the street.  Be sure to take a look at the great video – BIM in 60 Seconds. The Brits are poised to export their mega-project expertise around the world. Oregon State University continues to turn out the research. This time its using lidar to identify potential landslides.

Enjoy and please tell a friend about us.

Posted in Business Development, Marketing | Leave a comment

Fault Discovered with Lidar

As reported in the Yakima Herald Federal geologists this month discovered a fault just west of this Columbia River-side city that could cause the geological community to rethink the location of the epicenter of the famed 1872 earthquake.

Sherrod was convinced that an unidentified fault was visible at the edge of one of the LIDAR images. He traveled to the site in 2012, but found terrain too steep for a field investigation, Weaver said. The agency flew over the area again to get more LIDAR images of that specific area.

“In that image, this fault shows up like gangbusters,” Weaver said.

Sherrod confirmed his suspicions early this month when he went back armed with a permit for digging.

Posted in airborne LiDAR, Environmental, Mapping | Leave a comment

Compression Strategies for Lidar Waveform

This paper addresses the issues associated with the use of full waveform lidar. At the top of the list is the need to compress the data given the quantity of information that is being returned and collected.

This work introduces a waveform cube model to compress waveforms in selected subsets of the cube, aimed at achieving decreased storage while maintaining the maximum pulse rate of FWD systems. In our experiments, the waveform cube is compressed using classical methods for 2D imagery, such as JPEG-1 that are further tested to assess the feasibility of the proposed solution.

The spatial distribution of airborne waveform data is irregular; however, the manner of the FWD acquisition allows the organization of the waveforms in a regular 3D structure similar to familiar multi-component imagery, as those of hyper-spectral cubes or 3D volumetric tomography scans.

The results were promising.

Posted in airborne LiDAR, Full waveform, Research | 1 Comment

Teen Develops 3D Laser Scanner

A teen with an inventive spirit and $40 in materials has developed his own version of a laser scanner.

Angshu Madge who is in Year 9 at St Joseph’s College in Mildura, recently took home a bursary for his creation from this year’s Science Talent Search. He designed and built a 3D laser scanner using everyday items, for the statewide student competition.

“It transforms video footage of an object with a laser line being swept over it, ” Angshu says. “It turns it into a three-dimensional image on a computer, which can then be used for different modelling and film making and all kinds of stuff,” he says.

Coming from a family of scientists, Angshu says he had some help at home, but his invention was mostly a solo project.

Posted in Sensors | 2 Comments