Leica HDS 3000 in the Lab

Verifying Terrestrial Laser Scanner Quality
To the user the terrestrial laser scanner (TLS) is a black box; measurement procedure and data processing are treated as classified. Vendor provided technical specifications are reliable but may be inadequate, while verification is complicated. Using Leica HDS 3000, the authors developed and tested a new method for verifying the quality of TLS data. Surprisingly, the angular accuracy of the system appeared ten times better than specified. One of the most used measurement principles for terrestrial laser scanners (TLS) is the spatial polar method: distances are measured by a pulse or phase distance meter and the two perpendicular angles determined... (read more)
2007-07-07 12:00:00

Camera Laser Scanner

Geo-knowledge for Preservation of St Maria Maggiore, Italy
Image-based modelling is still the most widely used approach in building documentation and 3D investigations, but panoramic camera laser scanners are gaining in importance. They offer large fields of view, good accuracy and direct photo-texturing. The authors have tested the information content and performance of such systems in 3D modelling of St Maria Maggiore, the ancient church in Bergamo, Italy. Technology is moving towards the development of an automated hybrid measurement system that may be called the "panoramic camera laser scanner", consisting of a Lidar device solidly integrated with a calibrated digital camera. Such new devices collect spatial point-clouds and,... (read more)
2007-07-07 12:00:00

EuroDAC2

Certification of Digital Airborne Mapping Products (2)
Digital airborne imaging has grown in importance over recent years. Large-format digital cameras can fully compete with analogue mapping cameras, and for some applications their performance is better. However, methods of calibration and certification used for analogue cameras are not individually transferable as they are based on laboratory calibration, while for digital cameras the entire data-generation process has to be considered. The author describes a new European initiative, EuroDAC2, aiming at a Europe-wide certification procedure for digital airborne mapping cameras. The new project on European Digital Airborne Camera (EuroDAC2) Certification is led by the European organisation for Spatial Data Research... (read more)
2007-08-11 12:00:00

USGS QA Plan

Certification of Digital Airborne Mapping Products (1)
To facilitate acceptance of new digital technologies in aerial imaging and mapping, the US Geological Survey (USGS) and its partners have launched a Quality Assurance (QA) Plan for Digital Aerial Imagery. This should provide a foundation for the quality of digital aerial imagery and products. It introduces broader considerations regarding processes employed by aerial flyers in collecting, processing and delivering data, and provides training and information for US producers and users alike. Since 1973 the US Geological Survey (USGS) has provided analogue calibration services within the US. Interior orientation parameters and other characteristics of an individual camera were stipulated in... (read more)
2007-08-11 12:00:00

Launch Date for WorldView-1

Ball Aerospace & Technologies Corp., ITT Corporation and DigitalGlobe have announced delivery of its WorldView-1 satellite to Vandenberg Air Force Base in California for its scheduled launch on Tuesday, 18th September 2007. WorldView-1 is the first of two new next-generation satellites DigitalGlobe plans to launch. Upon launch on September 18, WorldView-1 will undergo a calibration and check out period and will deliver imagery soon after. First imagery from WorldView-1 is expected to be available prior to October 18, the sixth anniversary of the launch of QuickBird, DigitalGlobe's current satellite. WorldView-1 will have an average revisit time of 1.7 days and... (read more)
2007-08-14 09:38:57

Trimble European Headquarters

Role of Positioning in Improving Work Processes
Founded in 1978 in Sunnyvale, California, US, Trimble provides positioning solutions that enable professionals in many areas to improve their work processes. As well as utilising positioning technologies such as GPS, laser and optics, solutions include software content and wireless technologies to tightly couple the field and back office. The company has a worldwide presence, with more than 3,400 employees in over eighteen countries. Trimble’s European headquarters are in Raunheim, Germany. This article results from a visit to Trimble's European headquarters and kicks off a new monthly column in which one of our editors will report and reflect on a... (read more)
2007-09-19 12:00:00

Beidou

China now has five navigation-and-positioning satellites, the launch of the fifth Beidou satellite took place in April. The system provides regional coverage of China and surrounds. It is named Beidou after the group of seven stars (Septentrio is Latin for ‘north') of the constellation Ursa Major, known in many cultures under different designations, in the UK ‘The Plough', ‘Big Dipper' in the US and ‘Big Mother Bear' in Russia. Others see the constellation as resembling a wagon. The first Beidou satellite (1A) was launched on 30th October 2000 followed by 1B on 20th December 2000. Since 2001 China's army and... (read more)
2007-09-19 12:00:00

Affordable Precise Positioning

OxTS
GPS is good for perhaps 70% of surveying needs. Inertial Navigation is the forgotten friend of GPS. Traditionally complex and expensive, Inertial Navigation has become competitive, easy-to-use and cost-effective. Need position? Use GPS. It's obvious enough. But when you can't use GPS the cost of surveying rapid­ly increases. Inertial Navigation Systems (INS) are positioning systems alternative or complementary to GPS. They have traditionally been expensive and restricted mainly to military applications. Their use in missile-­guidance has induced governments to place export restrictions on them, while specifically military interfaces make most virtually un­usable to civilians. Anyone trying to purchase a military... (read more)
2007-09-19 12:00:00

Intergeo 2007 - Preview

Year after year Intergeo demonstrates how exceptionally flourishing is the geo(infor)matics business. Geo(infor)matics is all about improving human understanding of the earth, enabling management and staff in both public and private sectors to make better decisions and take optimal action. And Intergeo is all about the means of acquiring and processing the necessary geo-information. This year marks the thirteenth consecutive running of this major conference and trade-fair for geo­desy, geoinformation and land management. The venue shifts from year to year, always within the boundaries of Germany. Last year the event took place in three halls at the New Munich Trade... (read more)
2007-09-19 12:00:00

DigitalGlobe Successfully Launches Worldview-1

DigitalGlobe (CO, USA) has successful launched and deployed WorldView-1. The satellite launched at approximately 11:35 AM PDT on a Boeing Delta II 7920 rocket from Vandenberg Air Force Base in California, USA. The launch of WorldView-1 marks 75 consecutive successful launches of a Delta II rocket and the second successful commercial launch for Boeing Launch Services in 2007. Shortly after the launch, a DigitalGlobe ground station received a downlink signal confirming that the satellite successfully separated from its launch vehicle and had automatically initialized its onboard processors.  WorldView-1 is currently undergoing a calibration and check-out period and will deliver imagery... (read more)
2007-09-20 12:00:00
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