Bathymetry from UAV Imagery and Machine Learning

Improving Results with Refraction Corrections
Accurate bathymetric mapping of shallow areas is essential for a plethora of offshore activities. Through Structure from Motion (SfM) and Multiview Stereo (MVS) techniques, images can provide a low-cost alternative compared to Lidar and sonar systems while also offering important visual information. This article presents a new framework for mapping the seabed in clear and calm shallow waters for small- and large-scale surveys using aerial imagery and machine learning to correct the geometric effects of refraction on the 3D point clouds and the imagery. SfM is a photogrammetric technique for estimating 3D structures from 2D image sequences. It involves acquiring... (read more)
2020-10-13 10:42:39

Imagery Sought for Calendar

Submissions for CARIS’ traditional calendar contest are now being accepted to be featured in the 2014 edition. CARIS software users are encouraged to submit their favourite CARIS imagery including geospatial datasets, maps, charts, 3-D views and more. The submission deadline is Friday 13 September 2013. This year judging will be opened to the public. CARIS users and friends will be able to vote for their favourite images through the CARIS website and on CARIS' social media pages, Facebook and Google+. Voting will take place from 23 September to 13 October 2013. Once the voting period ends, the 12 images with the highest... (read more)
2013-07-30 12:00:00

Imagery-derived Bathymetry Validated

Imagery-derived Bathymetry Validated Dear Sir, I was startled by an article in the January/February 2013 issue entitled ‘Imagery-derived Bathymetry and Seabed ­Classification Validated’, which took me back to 25 years ago when I was busy validating our first official satellite chart following the launch of SPOT 1. Our ground survey had been preceded even earlier by a push-broom scanner simulation performed with a Navy P2 aircraft. What disturbs me in this remarkable display of hydrographic excellence is that the authors are attempting to cajole readers into thinking that Satellite Derived Bathymetry (SDB) is a revolution, whilst it has been in... (read more)
2013-04-02 03:09:03

Subsea Imagery Collaboration

Fugro Chance, USA, and Coda Octopus Group (USA) have entered into a co-operation agreement for two years to take advantage of Coda Octopus Echoscope. This relationship will give Coda Octopus early access to real-world requirements associated with Fugro Chance projects. In return, Fugro will have the advantage of working with Coda Octopus to develop tailored solutions for its clients’ subsea imagery deliverables. Having access to the myriad of data acquired by Fugro will enable Coda Octopus to utilise the Echoscope in a variety of applications and challenges, thus maintaining a cutting-edge in sonar technology. Coda Echoscope Dual Frequency 3D Sonar... (read more)
2013-03-19 09:06:25

Before and After Satellite Imagery

The impact of the catastrophic tsunami that inundated the coast of Japan in the aftermath of the 11th March earthquake is plain to see on comparison satellite images made before and after the disaster. The images, mostly being sourced from Google Earth and using imagery from various providers, are displayed in several ways such as a slideshow where the recent images are following the older ones and images containing a slider dividing the old and new situation, making the comparison interactive.   (read more)
2011-03-14 10:31:55

First UAV Flight from Unmanned Boat

The newest aircraft carrier does not have acres of flight deck. In fact, it has no deck at all. Rather than carrying a crew of thousands, it sails without a soul on board. Yet the aircraft that it operates can fly much longer and further than anything based on a fleet leviathan. That aircraft is Aerovel’s 20kg Flexrotor, which combines VTOL and a small footprint with a Hawaii-to-West Coast range. The carrier is a 4-metre skiff equipped to launch, retrieve and service the Flexrotor automatically. In what are believed to be the first-ever flight cycles of an unmanned aircraft based... (read more)
2013-10-25 10:17:21

Riegl and Applanix Integrate on UAV

RIEGL Laser Measurement Systems and Applanix Corporation have announced that the Applanix AP50 GNSS-Inertial sensor system has been successfully integrated with RIEGL’s VQ-820-GU topo-bathymetric airborne laser scanner on board the Schiebel CAMCOPTER S-100 UAV. The RIEGL VQ-820-GU is specifically designed to survey sea beds, rivers or lakes and is well suited for combined ground and hydrographic airborne survey. The Applanix AP50 GNSS-Inertial system is a GNSS-Inertial sensor plus Inertial Measurement Unit (IMU) in a compact form factor. It features a high performance precision GNSS receiver and the Applanix IN-Fusion GNSS-Inertial integration technology running on a powerful, dedicated Inertial Engine (IE)... (read more)
2013-04-19 09:41:09

HYPACK Enters UAV Data Collection Era

HYPACK, USA, has partnered with Infinite Jib, Velodyne and SBG to provide a mapping solution that represents a next evolution in the unmanned aerial vehicle (UAV) market: NEXUS 800 UAV. This solution, powered by HYPACK, represents a full end-to-end solution, seamlessly harmonising Lidar data with photogrammetry. The NEXUS 800 is a turnkey system that integrates hardware and software to provide an advanced and seamless solution for Lidar survey planning, data acquisition, post processing and analysis and product creation. Powered by the HYPACK-HYSWEEP mapping software, the operator can plan, acquire, and process the Lidar and Photogrammetry data onboard a high powered Windows... (read more)
2016-10-25 08:51:57

Hydrographic Airborne Scanner Integrated in UAV

Schiebel and RIEGL Laser Measurement Systems, Austria, have successfully integrated the Schiebel CAMCOPTER S-100 Unmanned Air System (UAS) together with the RIEGL VQ-820-GU Hydrographic Airborne Sensor. The integration marks the first time that this new airborne sensor was flown on board of a UAV. The S-100 helicopter UAS carried a special Schiebel-made composite pod containing the sensor, the IMU-GNSS unit, the data recording and transfer unit as well as a digital camera, during the flight tests in Grossmittel, Austria, which were carried out this month. This fully integrated system thus enables acquisition of high-accuracy hydrographic and topographic data, even in... (read more)
2012-12-20 01:20:54

Calendar Contest Imagery Submission Now Open

Now in its ninth year of production, CARIS's calendar contest is back, and Canada-headquartered CARIS is now accepting submissions for the 2015 edition. CARIS software users are invited to submit their favourite CARIS images including geospatial datasets, maps, charts, 3D views and more. Images can be entered into the contest on the CARIS website. The submission deadline is 26 September 2014. Images can be submitted online. Similar to last year, CARIS users and friends will be the judges of the contest by voting for their favourite images. Voting will take place from 3 to 19 October 2014 on the CARIS... (read more)
2014-07-21 10:33:18
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