China Leaps Ahead with Geospatial Research

GIM International Interviews Professor Dr ZHANG Jixian
Prof. Dr John van Genderen, himself a leading western expert on geospatial developments in China, interviews Professor Dr ZHANG Jixian, acting president of the Chinese Academy of Surveying and Mapping on the rapid evolution of geospatial ideas in China. Could you provide a brief overview of China’s earth observation missions, from their start up until now? China initiated a plan to develop a self-owned, proprietary (in terms of intellectual property rights) earth observation system after DFH-1, the first Chinese satellite, in 1970. Since then, many earth observation missions have been launched. As of today, we have developed five series of... (read more)
2005-03-24 12:00:00

GNSS Positioning

Status and Features
Nowadays, GNSS receivers have scores – and often hundreds – of channels, enabling them to track GPS, Glonass, Galileo and Compass signals simultaneously. The whole workflow from satellite tracking to calculating the coordinates of the position in a preferred reference system can be conducted automatically in real time. The price of GNSS receivers has dropped steadily since the first GPS receivers came onto the commercial market in 1982. In conjunction with the latest product survey results for GNSS receivers (available at www.geo‑matching.com), the author puts today’s GNSS status and features in perspective. (By Mathias Lemmens, senior editor, GIM International, The... (read more)
2012-12-18 01:53:20

Geoprofessionals Should Look Ouside Their Own Box

Jantien Stoter Bridges The Gaps
Having specialised in 3D GIS, Jantien Stoter has already taken her next leap and is now studying the concept of 5D GIS. Meanwhile, she realises that there are still some gaps to bridge between technical sciences and practice. A highly technical person herself, she shares her views on which directions geoinformation professionals should be looking in to keep the field alive. She recently finished the first phase of a pilot on a 3D standard for The Netherlands' spatial data infrastructure involving nearly 70 stakeholders. The second phase is currently examining how to put the results of the first phase into... (read more)
2011-12-19 02:19:00

Low-cost versus High-end Systems for Automated 3D Data Acquisition

Modelling an Early Mediaeval Ring Fort in Germany
Topographic mapping is a standard surveying task and the instrument of choice used to be a total station. The use of terrestrial laser scanning has become popular over the past decade or more, but today there is a much wider choice of methods for the acquisition of a digital surface model (DSM). For the 3D recording of an early mediaeval ring fort, the use of three modern systems was investigated: a portable (kinematic) laser scanning system, a static terrestrial laser scanning system (TLS) and a photogrammetric unmanned aerial system (UAS). The systems were compared to each other based on the... (read more)
2017-01-09 12:57:53

Bringing Colour to Point Clouds

Until now, most commercially available airborne Lidar systems have operated on one single wavelength, reflecting energy from a pulse which is then used for classification or visualisation. New developments have produced the first multispectral Lidar systems which scan using laser pulses in a number of different wavelengths. Multispectral Lidar data contains valuable information about the objects scanned. The fast-moving advancements in this field are likely to represent the next technological leap in Lidar systems. (By Sam Fleming, Iain Woodhouse and Antoine Cottin) Lidar systems have fundamentally changed the world of mapping and surveying. Airborne systems can cover large areas and... (read more)
2015-04-03 09:51:58

A Visit to...Hewlett Packard Barcelona

Hewlett Packard (HP) celebrates the twentieth anniversary of its Barcelona site this year. The company has a portfolio spanning printing, personal computing, software, services and IT infrastructure, and Barcelona is the nerve centre of its predominant large-format printing activities. On 3rdand 4thApril 2008 the international professional press was invited to look ‘Behind the Scenes’.<P>   "Our workforce in Barcelona consists of more than two thousand people, including employees working in our engineering and support facilities," Francois Martin introduces us to the facility. Since 2006 he has been marketing director for Graphic Arts. As might be expected, nearly 75% of the... (read more)
2008-05-17 12:00:00

Urban Energy Modelling

Semantic 3D City Data as Virtual and Augmented Reality
The visualisation of results from urban energy modelling and simulation is a crucial part of energy research as it is the main communication tool among scientists, engineers and decision-makers. Energy modelling and simulation results are directly linked to spatial objects and 3D therefore becomes a necessity. Multiple interactive 3D visualisation environments exist, such as Esri’s City Engine or CESIUM web globe. However, these applications are mainly targeted as 3D viewers for use on desktop machines and lack immersive components that enable users to truly immerse themselves, explore and interact with the real environment on-site. In this study, the team focused... (read more)
2017-11-23 10:24:29

A Brilliant Career

GIM International interviews Gottfried Konecny
Professor Gottfried Konecny, one of the most respected names in photogrammetry, shares some reflections on his work and profession. He worked in post-war Neumarkt as a teenage draughtsman, was chief surveyor on the 1965 Canadian Mount Kennedy expedition, mapped the lunar landing site at NASA, and has been involved in nearly all the European space mapping missions. And these are just some of Professor Gottfried Konecny’s extraordinary achievements. Today emeritus professor at the University of Hannover, he shares withGIM Internationalsome of the highlights of a career in photogrammetry that has spanned well over six decades.<P> Why did you choose a... (read more)
2009-07-17 12:00:00

Statutory versus Customary II

Institutional Weaknesses in Nepal
Of the roughly thirty million people living in Nepal, a majority belongs to peasant households and lives below the international poverty line of $1.25 a day. The peasant population has also, under former customary land tenure arrangements, been exploited and pauperised. Land related statutory acts introduced since 1951 have not brought security of rights for the actual cultivators of the land, and thus discourage investment in it. Thanks in part to institutional weaknesses, land administration services are today distrusted by the population. The author inventories these weaknesses and provides suggestions for solution. For many centuries farming has been the principle... (read more)
2011-01-04 02:37:56

Handheld Land Administration Mapping Methods in Kenya

Institution of Surveyors of Kenya Demonstrates Alternative Approaches
Fit-for-purpose approaches to land administration have been tested in Kenya, with a focus on the provision of land titles with inclusiveness for all in an approach that is affordable, fast and ‘good enough’. Earlier this year a group of Kenyan surveyors performed a field test in Makueni County, collecting land data using handheld devices. This first test was a learning experience; a more comprehensive test must be conducted to prove the scalability of the approach. The fit-for-purpose approach recommends the use of ‘visual boundaries’ to identify the delineation of land rights. There are many naturally visible boundaries in rural areas... (read more)
2017-06-01 08:57:27
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