Subsea Metrology Combining Acoustics and Photogrammetry

Subsea metrology is one of the most challenging tasks for surveyors engaged in marine construction. Metrology involves determining the distance and relative attitudes of objects on or close to the seafloor. Accuracies of a few centimetres are achieved with objects 15m to 80m apart. Several methods are used, each with its own advantages and disadvantages. By Eric Guilloux, SAIPEM Project Surveyor, France. Invariably, metrology is required at the critical stages of field development and the main goal for improvement is to reduce the time taken for acquiring data. The ­technique discussed offers significant improvements in terms of time and required... (read more)
2014-09-17 09:03:10

A New Solution for Subsea Metrology

Combination of Acoustics and Photogrammetry
Invariably, metrology is required at the critical stages of field development and the main goal for improvement is to reduce the time taken for acquiring data. The technique discussed offers significant improvements in terms of time and required equipment. Offshore Construction During offshore construction several structures have to be interconnected by means of spools or jumpers. In order to determine the dimensions and relative attitudes of the connections, surveyors deploy ROV-mounted instrumentation. IMCA S019 Guidance on Subsea Metrology offers the following combined accuracy guideline: 50mm to 150mm in X,Y and Z axis 0.5° to 1° for relative pitch, roll and heading.... (read more)
2014-09-02 11:57:09

Trimble Acquires INPHO

Trimble has acquired privately-held INPHO (Germany) in an all-cash transaction. INPHO is a Supplier of photogrammetry and digital surface modeling for aerial surveying, mapping and remote sensing applications. Financial terms were not disclosed. As an end-to-end photogrammetry solutions supplier, INPHO's product portfolio covers the entire workflow of projects, including aerial triangulation, stereo compilation, terrain modeling, orthophoto production and image capture. In addition, INPHO offers innovative software solutions for processing digital terrain models, including advanced filtering and editing of LIDAR data. With a customer base of more than 1,000 users in over 100 countries, INPHO products are used by service companies... (read more)
2007-02-15 09:30:49

Underwater Metrology

Exploiting old techniques for underwater surveying and metrology
Photogrammetry has existed as a method for more than hundred years. Digital techniques and data power have made it possible to exploit another side of photogrammetry, Close Range Photogrammetry. Close Range Photogrammetry is the name given to the ingenious technique of ascertaining from two dimensional images spatial data such as the size and position of objects. Blom Maritime AS began using this technique onshore in the early 90s for customers in the oil industry. While it certainly showed promise, technological restraints prevented success. However, with the advent of improved digital cameras, enhanced software and faster computers, Blom returned to this... (read more)
2008-01-01 01:00:00

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

FIG, IHO and ISPRS Support Young Geo-Professional Magazine

The International Federation of Surveyors (FIG), the International Hydrographic Organization (IHO) and the International Society for Photogrammetry and Remote Sensing (ISPRS) have declared their support for the Young Geo-Professional magazine initiative by sponsoring the project. The publication, called Young Geo Professional, will position geomatics and hydrography as an attractive and fascinating field. Further, it will make the young people aware of the wide scale of fields of application and future job possibilities. Vice Admiral A. Maratos, president of the International Hydrographic Bureau (IHO office) commented: "Almost everything that happens at sea depends on some level of hydrographic information. One of... (read more)
2008-08-20 10:31:31

MAPPS’ Membership Towards Record Level

MAPPS, an association of geospatial, mapping and photogrammetry companies in USA, has added fifteen new member firms – now reaching more than 160 member and associate member firms. This number is amongst the highest membership in 25 years. The 15 newest MAPPS members are 3DS (Diversified Design & Drafting Services Inc.), Advanced Mapping Technologies LLC, Aerial Viewpoint, Aero Data Imaging LLC, AviaTerra Geospatial Inc, Caris USA Inc, First American Flood Data Services, John Deere Agri Services, Kappa Mapping Inc., M7 Visual Intelligence, Morris-Murray Aerial Photogrammetry & Surveying Services, Pickett & Associates Inc., Pictometry International Corp., SIGSA and Valtus Imagery Services... (read more)
2007-02-26 10:05:10

MMT Contributes to Wreck Mapping and Research

MMT is participating in and sponsoring the investigation on the 530-year-old wreck Gribshunden outside Ronneby, Sweden. MMT and MARIS (the Maritime Archaeological Research Institute) at Södertörn University have evaluated different techniques to map archaeological remains. MMTs former survey vessel Triad mapped the wreck site of Gribshunden with multibeam echo sounders and used a Blue View 3D sonar scanner on a stand next to the wreckage. This method provides a high resolution 3D model and an excellent overview of the wreck and surrounding area. Photographic material has now been gathered in order to build photogrammetry of the wreck site. The data... (read more)
2015-07-15 10:29:55

Darren Wilkinson

Darren Wilkinson is employed by Land Surveys in Business Development for Geospatial Services and has been in the geospatial industry for 32 years. He holds qualifications in Cartography, Photogrammetry and Business. (read more)
2017-06-13 04:23:11

Dynamic Laser Scanning Set to Innovate Metrology Techniques

In December 2016, DOF Subsea (DOF) conducted a demonstration of dynamic underwater laser scanning as a replacement for traditional metrology techniques at The Underwater Centre in Fort William, Scotland. The demo showcased 2G Robotics’ and Sonardyne’s complete dynamic survey solution. The solution integrates 2G Robotics’ underwater laser scanner, the ULS-500 PRO, with Sonardyne’s inertial navigation sensor, SPRINT; Syrinx DVL and 6G acoustics. Seatronics, channel partner for 2G Robotics and provider of Sonardyne rental equipment, provided sensors and project/technician support. LBL and Photogrammetry Historically, metrology campaigns using Long BaseLine (LBL) acoustics and photogrammetry have demanded significant vessel and ROV time. Additionally, LBL... (read more)
2017-03-22 09:12:55
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