Aerial Survey of the Maldives

The April 2008 issue of GIM International (page 11) summarised a project to map the Maldives as an example of how aerial photogrammetry is today applied for mapping large, complex areas. The authors provide further details of the Maldives project, its biggest achievement being first-time-ever 1:25,000 topographic maps of the entire country and 1:1,000 maps of sixteen islands.<P> Republic of Maldives is a chain of islands in the Indian Ocean, spreading north-south over 868km and covering 90,000km2, 99% of which is water. The land area consists of 1,192 islands populated by 280,000 (2001) people. At the turn of the millennium... (read more)
2008-07-09 12:00:00

Interacting with Big Geospatial Data

Methods for Virtual Exploration and Visual Analysis
Advances in capturing techniques such as laser scanning and photogrammetry have significantly increased the volume of geospatial datasets. Big geodata has become an important asset for analysis and decision-making, but also poses a challenge for state-of-the-art visualisation techniques. This article presents research results addressing this problem for the infrastructure and planetary science application domains. The methods discussed here enable users to fluently explore and efficiently analyse the growing wealth of geospatial data.  The data volume of 3D reconstructions is steadily growing for two reasons. Firstly, there is a demand to increase the accuracy of data acquisition, now reaching even sub-millimetre... (read more)
2017-04-20 09:29:33

GSDI: Twelve Years, Ten Conferences

GIM International Interviews Past President Jarno Ratia
Jarmo Ratia, CEO, National Land Survey of Finland, left office as president of the Global Spatial Data Infrastructure (GSDI) Association during the tenth conference, held from 25th to 29th February 2008 in Trinidad and Tobago. As past president he remains a member of the three-person executive board. We discussed with him the SGDI mission, its achievements and future.<P> What prompted the Global Spatial Data Infrastructure (GSDI) concept?   Tens of years ago the value was already understood of collecting data just once and transferring it through a network to other potential users. Considerable savings would thus be achieved. The next... (read more)
2008-04-11 12:00:00

Benchmarking Image-based DSM Generation

The Potential for High-quality Airborne Data Collection
In view of the rapid advancement in photogrammetric technology and software for 3D reconstruction, the European Spatial Data Research Organisation (EuroSDR) initiated a benchmark project on image-based generation of Digital Surface Models (DSM). Such a comparative evaluation provides a platform for software developers to demonstrate the potential of their ongoing work. Furthermore, it can help users like National Mapping and Cadastral Agencies responsible for state-wide generation of high-quality DSMs to understand the applicability of such tools while triggering further developments based on their needs. The comparative results from 10 participants presented here provide comprehensive insight into the landscape of dense matching... (read more)
2013-12-30 02:58:21

Map Middle East 2007

Geospatial Convergence: the Next Step
Map Middle East 2007, the third Annual Conference and Exhibition on Geospatial technologies and their applications, was held from 9th to 11th April 2007 at the Dubai International Convention and Exhibition Centre, Dubai, United Arabic Emirates (UAE). Started in 2005 as a regional initiative for the Middle East region, this year’s theme was Geospatial Convergence: The Next Step. During the Plenary Session on Geospatial Convergence, Marc Tremblay, general manager of the Commercial Business Unit at Digi–talGlobe, told conference that geospatial data had gone mainstream; over 100 million downloads daily now take place over Google Earth. What is more, firms were... (read more)
2007-05-15 12:00:00

Overcoming the Bottlenecks of Today’s Dense Point Clouds

GIM International interviews Murat Arikan, NUBIGON
NUBIGON is a start-up company with offices in Turkey and Austria that has developed powerful reality capture software. The company’s solution visualises Lidar and photogrammetric point clouds in real time and in full HD, while retaining the accurate precision that is needed by many professionals who are working with point clouds. 'GIM International' decided to interview Murat Arikan, the company’s ambitious founder and lead software developer, to find out more. NUBIGON specialises in software to visualise 3D point clouds acquired by Lidar or photogrammetry. What are the main bottlenecks in the visualisation of today’s dense point clouds? The most prominent... (read more)
2017-09-19 11:50:32

Towards Automated Detection of Visual Cadastral Boundaries

Initial Investigations of Imagery, Algorithms and Perceptions
The technology push behind emerging automated feature identification and line generation techniques provides a new opportunity for the domain of fit-for-purpose land administration. It could help to further automate the process of boundary generation in cadastral systems – particularly in contexts where large areas remain unmapped and cadastral boundaries align with topographic or visual boundaries. (By Yismaw Abera Wassie, Mila N. Koeva and Rohan M. Bennett) Fit-for-purpose land administration aims to align cadastral policies, administration and technology selection with the prevailing societal needs and capacity within a country context. It seeks to aid delivery of more rapid and low-cost cadastral boundary... (read more)
2016-08-01 11:08:24

Geospatial Goes Global

ASPRS Annual Conference
This year’s annual conference of the American Society for Photogrammetry and Remote Sensing (ASPRS) took place from 7th to 11th March, with the theme ‘Geospatial Goes Global: From Your Neighbourhood to the Whole Planet’. Aimed at a wide variety of professionals, the conference included more than four hundred technical and special session presentations and at least seventy poster sessions. Chip Groat, director of the US Geological Survey (USGS), gave the opening keynote address. He discussed the Earth Summit process that is creating agreements amongst space-faring nations of the world to more effectively integrate their Earth observation programmes and exchange the... (read more)
2005-03-21 12:00:00

Unmanned Aerial Vehicles for Glaciological Studies

Airborne Survey of Fountain Glacier’s Terminus Region
In July of 2010, researchers from the Department of Geography at the University of Calgary used a lightweight unmanned aerial vehicle (UAV) to carry out an airborne survey of the terminus region of Fountain Glacier on Bylot Island, in the Canadian Arctic. The survey comprised 16 flight lines, with a total of 148 photos being obtained from an average height of 300m above the glacier surface. A detailed surface model of the glacier and a 10cm resolution orthophoto were produced. The results from this survey will be used to quantify future changes in glacier mass and changes to surface flow... (read more)
2010-10-04 04:23:12

Geomatics Developments in Asia

14th International Scientific and Technical Conference 'From Imagery to Map: Digital Photogrammetric Technologies'
The International Scientific and Technical Conference was held for the 14th time from 20-23 October 2014 in Hainan, China. This year’s conference, which was themed ‘From imagery to map: digital photogrammetric technologies’, was opened by Victor Adrov, managing director and co-founder of Racurs, Moscow, along with SmartSpatio from Beijing, China, as organiser of the event. One of the features of this event is the shift of venue every year; 2014 was its first time in Asia, and China was chosen because of its rising influence on the geomatics market. Prof Chen Jun, National Geomatics Center of China, not only addressed... (read more)
2014-12-23 11:35:28
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