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

Lidar Survey over Ancient Maya City

Improving Archaeological Maps and Identifying Hidden Structures
The ancient Maya site of Copan, Honduras, was captured during an airborne Lidar survey in May 2013. The resulting products are accessible through 2D and 3D WebGIS tools and enable archaeologists to collaborate online. This interdisciplinary project, named MayaArch3D, showed that Lidar data can improve archaeological maps, identify hidden structures as laser pulses partly penetrate jungle canopy, and facilitate collaborative research. (By Jennifer von Schwerin, Germany, Heather Richards-Rissetto, USA, and Fabio Remondino, Italy) Copan, which is on the UNESCO World Heritage list, was once an important cultural and commercial centre on the south-eastern periphery of the Maya world. The landscape... (read more)
2016-11-08 03:18:09

Preferred Backgrounds: Engineering and Geography

Developments in Geomatics Education (4)
In the March issue of GIM International we started a series on Developments in Geomatics Education, to be continued over forthcoming issues. One interesting topic here is the background of people working in organisations using Geo-Information Technology (GIT) as their primary tool to support and streamline company business processes. GITA recently released a report that provides a wealth of interesting and insightful statistics; hereunder some further analysis and discussion. The Geospatial Information & Technology Association (GITA), a not-for-profit organisation, based in Aurora, USA, has published the annual Geospatial Technology Report for eight years now (see textbox). The new report for... (read more)
2007-03-21 12:00:00

Survey and GIS in San Diego

Everyone forms their own impressions of San Diego, but for surveyors and GIS folks in the Summer, it means the largest geospatial event in the world, the ESRI Survey & Engineering GIS Summit combined with the ESRI International User Conference. The 28th annual User Conference (UC) came in early August with the theme ‘Building New Opportunities’, the bulk of the Survey Summit running as prelude the previous weekend. The summit drew over four hundred attendees, a roughly 8% increase over last year. Both conferences featured a trade show. The summit also includes the Survey and Leadership Forum, actually, a Special... (read more)
2008-11-11 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 03:05:25

Automatic Tie-point Extraction

Novel Matching Method for Handling Non-standard Imagery
One of the most complex and time-consuming tasks in the photogrammetric workflow is the extraction of corresponding points in two or more overlapping images. This is the first stage of aerial triangulation and block adjustment aimed at computing the positions of the projection centre and the orientation of each image. Automating the extraction of these so-called ‘tie points’ can be challenging, especially when non-standard approaches such as cameras mounted on UAVs or oblique imagery are used. The authors present a novel matching method able to handle the most challenging imagery. The aim of matching is to identify corresponding points in... (read more)
2012-04-25 04:16:35

Land Administration in Estonia

Since Estonia gained independence in 1991, huge efforts have been made to re-establish private property. Technologically speaking, land reform and land administration are a success; nearly the whole country has been registered and information on individual parcels can be disseminated to institutions and the general public via the web. However, lack of transparent land policy incapacitates the system from optimally serving land-management aims.<P> What are the main goals of land administration in Estonia During the nineties the main goal was land reform, with the political and economic goal of re-establishing private property. Land reform was the focus of attention for... (read more)
2008-11-11 12:00:00

A Truly Photogrammetric UAV

AviSystem/Taxus SI
The AviSystem UAV was made on the assumption that it was intended to be a photogrammetric system. Hence, when designing the AVI, it was created for long, stable, precise and efficient flying – photogrammetric flying. AVI right before take-off. The Polish company Taxus SI Ltd. embarked on the AviSystem project in 2009 with support from the European Regional Development Fund. Poland’s best specialists in the field of unmanned aircraft construction were invited to join the project. Design of the entire system, of which the main element is the AVI drone, was completed within two years. The AVI is an electrically... (read more)
2013-04-12 12:38:21

Strong Emphasis on R&D in Lidar

GIM Interviews Dr Allan Carswell, Optech Incorporated
Since its 1974 ‘spin-off’ from the Physics Department of York University in Toronto, Optech has grown to become a world leader in the development, manufacture and sale of advanced laser-based instruments and products incorporating pulsed, time-of-flight laser radar (Lidar) systems. Strong emphasis on R&D has led to these being applied in a wide range of applications. The company has received awards for business excellence, innovation, R&D and university collaboration. How big is your company in terms of number of employees and market share, who are your main clients and how is your customer-base distributed over the continents? With over two... (read more)
2006-08-23 12:00:00
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