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

Building Bridges for Change

Gim International Interviews GDSI Association President Bas Kok
Geographic information technologies and spatial-data infrastructure play a crucial role in allowing governments, local communities, non-governmental organisations, the commercial sector, academia and the public to address pressing world problems. Approaches to building spatial-data infrastructures (SDIs) converge in many respects, and this, particularly in respect of national standards, practices and process, will be explored by the GSDI World Conference on Spatial Data Infrastructure Convergence. It will simultaneously explore new approaches to offering geographic data and services. The conference ?Building SDI Bridges to Address Global Challenges? takes place in Rotterdam (Netherlands) from 15th to 19th June. We spoke to president Bas Kok... (read more)
2009-05-29 12:00:00

Best Regulation Cadastral Surveys

As Little As Possible, As Much As Necessary
Land Information New Zealand (LINZ) is changing the form of cadastral regulation to allow the efficient operation of cadastral survey markets while ensuring the achievement of government cadastral outcomes. This, referred to as “Optimal Regulation”, is also being applied to other areas of business such as land registration, topographic mapping, hydrographic charting and valuation. The phrase 'as little as possible, as much as necessary' encapsulates this philosophy of optimising the level of intervention and enabling the marketplace to develop the best solutions to meet regulated requirements. The 'registration' (or ’approval’) of cadastral surveys is often tangled in technical compliance issues... (read more)
2007-06-14 12:00:00

Land Administration in the Asian Region

Lessons Learnt, Challenges and Opportunities
The degree of success of Land Administration projects in Asia varies. It is beneficial to take activities that have worked in one project and build them into others. Likewise, activities that have not worked need to be assessed to determine what benefits might emerge should they be made to work in another project. The author presents opportunities arising from lessons learnt in Asia. Land administration is a series of processes and not an end in itself. It aims at more effective management of land resources, securing of people’s property rights, economical and fair recording of transactions, and minimisation of social... (read more)
2006-03-27 12:00:00

Cadastre with Couleur Locale

GIM International Interviews Hernando De Soto
A radical reappraisal of attitudes to the developing world is required of the geomatics profession. This is the view of Hernando De Soto, author of The Mystery of Capital, who in this interview offers GIM readers detailed insight into his concept of land registration for the poor. Land registration as means of escape from poverty is the major premise of De Soto, one of the foremost thinkers of our age on informal economy. Originally an economist, and president of the Peruvian Institute for Liberty and Democracy, he has shaped current thinking on land registration and its positive outcome for the... (read more)
2010-10-04 04:06:07

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

Cartography for Everyone - You Too!

GIM International Interviews Dr David Fairbairn, Vice-President ICA Executive Committee
Since June 2004 ICA has been publishing a monthly one-page column in GIM International. Dr David Fairbairn is responsible for ensuring content for the ICA page and is himself a regular contributor. As vice-president he is further responsible for ensuring that ICA keeps an active eye on issues and paradigms affecting the practice of modern cartography. When was the International Cartographic Association (ICA) established and how is it organised in terms of structure? The International Cartographic Association was formally established in June 1959. But in fact it grew out of a series of international conferences addressing issues of common cartographic... (read more)
2005-12-29 12:00:00

Geomatics for Cultural Heritage Preservation

3D Recording, Documentation and Management
Geomatics technology is playing an increasingly powerful and invaluable part in recording, visualising and digitally reconstructing cultural heritage resources for preservation and management purposes. New tools have appeared in the past decades including laser scanning, rapid prototyping, RGB-D sensors, high dynamic range imaging, spherical and infrared imaging, mobile mapping systems, UAS-based imaging, augmented and virtual reality and computer rendering in multiple dimensions. Read on for some international examples of practical applications. (By Efstratios Stylianidis, Aristotle University of Thessaloniki, Greece, and Fabio Remondino, Bruno Kessler Foundation, Italy) Cultural heritage conservation relates to maintaining objects, architecture or historic places in their current state in order... (read more)
2016-02-29 05:22:40

Facing the Challenges - Building the Capacity

“I have been increasingly interested in and appreciative of the contribution of surveyors — the modest and often unsung heroes of civilisation.” The words of Marie Bashir, Governor of New South Wales, Australia, during her opening address to the FIG world congress held from 11th to 16th April 2010 at the Sydney Convention and Exhibition Centre SCEC in Australia. What a welcome! All honour to the profession; but also, as Ms Bashir went on to say, to the aboriginal peoples whose land this once was. Ms Bashir continued, "I wish to record my respect for the traditional owners of this... (read more)
2010-06-07 03:38:29
Search Filter