Surveying Profession in Transition

Report on FIG Congress 2018
The beautiful city of Istanbul in Turkey played host to the XXVI International Federation of Surveyors (FIG) Congress from 6-11 May 2018. With the theme of ‘Embracing Our Smart World Where the Continents Connect: Enhancing the Geospatial Maturity of Societies’, the congress brought together more than 2,300 professionals, academics and specialists from over 90 countries to discuss the current and future challenges of surveying. More than 400 papers were presented in a hundred sessions, including joint sessions with partners such as UN-GGIM, UN-Habitat, FAO and World Bank. This article looks back on some of the key highlights of the event. The welcome... (read more)
2018-06-13 10:44:46

Future-proof Data Storage

File and Database Storage Methods for Huge Point Clouds
Point cloud datasets have proven to be useful for many applications, ranging from engineering design to asset management. While point clouds are becoming denser and more accurate, new software is allowing an ever-broader user group for these datasets. However, due to their size and dependence on specialised tools, data management of point clouds is still complicated. A major consideration for data managers is the choice of point cloud storage format, as several different formats are available. Point cloud data can be collected in numerous ways, with laser scanning being the most common method. In terms of data management, it is... (read more)
2014-07-25 09:51:24

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

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 DigitalGlobe, 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)
2007-05-08 10:14:05

Bringing a New Level of Intelligence to UAVs

GIM International Interviews Jan Stumpf, CEO, Ascending Technologies
Although new UAV companies are taking off all the time, Ascending Technologies has been part of the geomatics world for several years and has already become a familiar face in the industry. In 2009 its renowned AscTec Falcon 8 went into serial production, setting a new standard for professional aerial imaging in the areas of aerial photography, industrial inspections and of course surveying. At GIM International we considered our 3rd UAS Special the ideal occasion to talk to Jan Stumpf, one of the founders of the German technology start-up. Mr Stumpf, on your website your company is described as a... (read more)
2016-01-05 02:25:06

Choosing the Best Digital Elevation Model

Canadian Force Base Gagetown
The process of achieving environmental stewardship is bound to available Digital Elevation Model (DEM) accuracy. A good DEM helps directly locate and monitor streams, sensible slopes and watersheds. Indirectly, it enables the production of orthophoto maps, intervisibility analyses and three-dimensional visualisation. In this project, three different DEMs covering Canadian Forces Base Gagetown in Atlantic Canada were tested: one DEM created from Lidar, and two DEMs generated photogrammetrically using high-resolution imagery. Comparison of data management, flexibility and software requirement confirmed the superiority of Lidar DEMs. View Larger Map Three different DEM datasets were used for this project. A Lidar DEM was... (read more)
2009-09-23 12:00:00

Managing Massive Point Cloud Data: Performance of DBMS and File-based Solutions

Today, Lidar and photogrammetry enable the collection of massive point clouds. Faced with hundreds of billions or even trillions of points, the traditional solutions for handling point clouds usually underperform. To obtain insight into the features affecting performance, tests have been carried out on various systems and the pros and cons have been identified. (By Oscar Martinez-Rubi, Peter van Oosterom and Theo Tijssen, The Netherlands) Point clouds have traditionally been processed into grids, vector objects or other types of data to support further processing in a GIS environment. Today, point clouds are also directly used for estimating volumes of complex objects,... (read more)
2015-09-25 01:11:20
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