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

China’s Unlimited Demand for Geomatics Specialists

GIM International interviews Professor Liu Jingnan
Having led the famous Wuhan University, home to the world's biggest geomatics faculty, from 2003 to 2008, professor Liu Jingnan is one of the most respected Chinese academics in geodesy and satellite positioning applications. Besides that, he has also been in charge of China's National Engineering Research Centre for Satellite Positioning Systems. Liu Jingnan shares his views on the rapid development of geomatics in China and his country's future role in the industry with GIM International.   Can you tell us about the history of the famous surveying university in Wuhan, which you headed up? In 1956, the Chinese government... (read more)
2011-11-09 02:58:00

3rd International Conference on Cartography and GIS

The third "International Conference on Cartography and GIS" took place two and a half years after the second one, which was held in January 2008 in the Bulgarian winter resort Borovets. There were in fact two different conferences, since the cartography conference was preceded by a weekend of "Digital Earth", which was a conference in its own and only few participants attended both conferences.   The conference was thus turned into a summer conference, held at the Black Sea resort Nessebar, a town known for its beaches, and maybe even more for its rich history and culture. Nice summer weather seduced... (read more)
2010-07-07 12:00:00

Satellite Mapping in Bhutan

High-Resolution Imagery in Generating Spacial Information
High-resolution satellite imagery (HRSI) has significant potential for producing 3D spatial information products. Nowhere is this more apparent than in remote areas of the world such as the small Himalayan Kingdom of Bhutan. A project was designed to both demonstrate the utility of HRSI for medium-scale map production, and to pass these technological skills and tools to the Bhutanese. The authors show the potential shown by HRSI in meeting the spatial information needs of a developing country.<P> To support national development initiatives, Bhutan needs more comprehensive topographic and cadastral mapping. In many fields, ranging from environmental management to land and... (read more)
2008-04-10 12:00:00

Towards All-in-one Photogrammetry

A Case Study of Dense Image Matching Using Oblique Imagery
Modern photogrammetric camera architectures provide high-resolution imagery in nadir and oblique views. This case study sets out to prove the potential of oblique imagery to deliver dense point clouds to be used for DEM, 3D city model and true orthophoto generation – an important step towards ‘all-in-one’ photogrammetry. 3D point clouds for DEM or orthophoto production are typically collected using airborne Lidar systems. The recent development of dense image matching methods provides an efficient alternative by deriving point clouds from imagery. Within this fully automated image processing pipeline, corresponding pixels between multiple images are determined. Each pixel represents a sight... (read more)
2012-04-26 11:32:21

Looking Far beyond the Horizon: Interview with Hi-Target CEO Steven Xu

These are exciting times in the geomatics industry. Innovative solutions are being developed, integration is the main keyword and the big players are acquiring smaller companies that add a new dimension to their portfolio. Europe, Japan and North America are traditional strongholds of geomatics, but several very ambitious companies from China are doing their utmost to catch up with the frontrunners. At Intergeo 2015 in Stuttgart, Wim van Wegen took the opportunity to meet Steven Xu, CEO of Hi-Target, who was more than happy to share his thoughts and expectations with GIM International. Read the interview here. (By Wim van... (read more)
2016-01-26 09:40:07

Potential of Small Satellites

GIM Interviews Dr Rainer Sandau, Chairman, International Academyof Astronautics (IAA)
Small satellites for earth observation are an important ongoing development in space research. How can mapping and disaster management benefit from small-satellite systems? What is the potential and what the challenges? Are small satellites an inferior alternative for developing countries that cannot afford large satellites? This month’s interviewee, Dr Rainer Sandau, provides answers to these and other questions. What are mission, scope and organisational structure of IAA? IAA encourages international scientific co-operation through scientific symposia and meetings and through the work of six commissions dedicated respectively to Space Physical Sciences, Space Life Sciences, Space Technology and System Development, Space System... (read more)
2007-04-17 12:00:00

Digital Aerial Cameras

New Developments
The growing need for geo-data everywhere is driving customers to demand shorter turnaround rates and higher levels of detail. These needs can be met by aerial imagery directly captured in digital format onboard an aircraft. In tandem with the new product survey on Digital Aerial Cameras (see our website), the author here gives an overview of new developments. In my overview published in GIM International April 2008, I categorised the various digital aerial cameras under linear- and area-array solutions: one of many possible groupings for these systems. Another, based on technological criteria, considers dimension (size, weight and number of pixels... (read more)
2011-03-28 04:13:34

Light Mobile Collection Tools for Land Administration

Proof of Concept from Colombia
Need for administration of property: estimated 75% of the relations between people and land not documented. There is an urgent need for the administration of property and land use rights worldwide as the basis for social and economic growth. Notwithstanding the enormous investments by governments and international organisations in the development of such systems over the past decades, it is still estimated that, from a global perspective, 75% of the relations between people and their land are not documented. So which methods and techniques can be used to develop land administration systems for all, and within our generation? Light mobile collection tools may offer a solution, as presented in this proof of concept from Colombia. By... (read more)
2015-11-16 10:44:07

Laser Scanner in a Backpack

The Evolution towards All-terrain Personal Laser Scanners
Evolution of Laser scanning: new prototype which can be held in a backpack for rugged terrain. Laser scanning systems have gone through a major evolution in the past decade. After the initial breakthrough of airborne laser scanners (ALS), other types of laser scanning systems have emerged, most notably terrestrial laser scanners (TLS) and mobile laser scanners (MLS). While these three main types of Lidar systems together serve a large number of applications, none of them are optimised for fast and flexible scanning in challenging locations, rugged terrain and complicated urban structures. Personal laser scanners (PLS) fill this void and are now evolving towards compact, agile and flexible solutions for mapping complex environments. This article explains the... (read more)
2016-02-15 10:57:34
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