ISPRS on Track for Melbourne

GIM International Interviews Orhan Altan
Orhan Altan is president of ISPRS. He gives us a sneak preview of the four-yearly ISPRS Congress which will be held in Melbourne, Australia, this summer. Seeing the potential for tremendous developments in the sector in the years ahead, Altan calls on governments to resist cutting back on sciences such as photogrammetry and remote sensing which, while still developing, are already very important. Back in 2009, you said that ISPRS should prioritise environmental monitoring and sustainable development. Is that still your standpoint?Yes – it is still my standpoint and also that of the ISPRS. In 2008, we established several working... (read more)
2012-04-25 03:51:51

Pushing Lidar to the Limits

High-resolution Bathymetric Lidar from Slow-flying Aircraft
Airborne bathymetric Lidar is an ideal tool to study underwater features in the usually rather clear waters along the coast of Australia. Due to the remoteness of many of the continent’s coastlines, this is often the only economically viable option for large-scale bathymetric mapping at high resolution. A new toolkit consisting of two airborne Lidar systems flown on a small and slow-flying research motorglider was trialled in NW Western Australia. The same technology will be used over the next three years in the context of a comprehensive study of submerged archaeological landscapes of the so-called ’Sea Country’, more than 1,000km... (read more)
2017-02-06 09:15:23

Multi-dimensional Cadastre: 3D and 4D

3D Data for Environmentally and Energetically Relevant Topics
In recent years, Germany's national mapping and cadastre information systems have become increasingly focused on demands for multidimensional applications, e.g. environmental protection, planning, energy supply and disaster management. The basic request of coverage and actuality was previously defined for the third dimension. In 2009, the Surveying Authorities of the States of the Federal Republic of Germany (AdV) arrived at the following decision: “The collection, data modelling and quality management of buildings for geotopographical surveying and for the cadastre are main tasks of the official German cadastre. This also includes the third dimension.” The fourth dimension (time) is now an integral component of the... (read more)
2015-12-03 11:32:42

Conservation: A Bird’s-eye View

GIM international interviews Lilian Pintea
GIS technology is an effective tool for analysing and mapping wildlife data such as population size and distribution, habitat change, use and preference, and regional biodiversity. The ability to overlay this data makes GIS helpful in outlining relationships between wildlife and people, and it has become a crucial element in monitoring threatened animals and their habitat to help prevent further loss or even extinction. At the Jane Goodall Institute (JGI) GIS is enhancing nearly half a century of wild chimpanzee research. Lilian Pintea, director of conservation science at the institute, integrates chimpanzee data with habitat-change and human land-use information from... (read more)
2009-06-30 12:00:00

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

Co-seismic Displacement Estimation

Improving Tsunami Early Warning Systems
Geomatics is not primarily aimed at investigating the causes and physical phenomena related to earthquake events. It has, however, over recent years established a fundamental role in monitoring and describing changes to the Earth’s surface. In particular, this article describes the state of the art of the GPS contribution to Seismology, and presents an innovative methodology, VADASE, that enables accurate estimation of co-seismic displacement waveforms in real time using standard broadcast products and high-rate carrier-phase observations collected by a unique GPS receiver. This represents a potential enhancement to GPS Seismology and an effective support for tsunami early warning systems. The... (read more)
2011-04-27 02:59:42

ASPRS Honorary Members Selected

Clifford W. Greve and Vincent V. Salomonson have been selected as the next Honorary Members of the American Society for Photogrammetry and Remote Sensing (ASPRS). Their nominations were recently approved by the ASPRS Board of Directors. This is the highest award bestowed by ASPRS and there can be only 25 living Honorary Members of the Society at any given time. Initiated in 1937, this lifetime award is given for professional excellence in recognition of individuals who have rendered distinguished service to ASPRS and/or who have attained distinction in advancing the science and use of the geospatial information sciences. Greve and... (read more)
2012-11-15 09:12:20

Preserving Technological Monuments in Russia

Terrestrial Laser Scanning of the Aurora Cruiser and the ‘Motherland Calls’ Statue
Technological monuments are vulnerable to decay. 3D modelling and documentation are essential to avoid them falling into irreparable decline and to enable future restoration. Terrestrial laser scanning (TLS) is a proven technology for capturing complex objects. Read about the TLS capture of two iconic technological monuments in Russia: the Motherland Calls statue and the Aurora cruiser. . (By Andrey Leonov and Mikhail Anikushkin, Russia) Technological monuments are more vulnerable to decline than paintings or manuscripts, since they are located outdoors and exposed to rain, temperature variations and other weather elements. They also often suffer from overdue maintenance due to a... (read more)
2016-08-09 08:58:22

Three Shows in a Row

The cusp carrying winter into spring saw three interesting geomatics shows across the USA from east to west. Tom Gibson, editor-in-chief of our US sister magazine, Professional Surveyor, visited one after the other and sent us this report.<P>   The Annual Conference and Technology Exhibition of American Congress on Surveying and Mapping (ACSM) took place at Spokane Convention Center in Washington, attended by about 1,550 people, up slightly on last year. More Work As usual the conference featured a slew of workshops. Gavin Schrock discussed GPS Communications by network transportation of RTCM via internet protocol (NTRIP). NTRIP is the most... (read more)
2008-05-20 12:00:00

Calibrating Survey Instruments

A Modern Calibration Bench
The geomatics profession is implicated in several ISO standards. The important ISO9001: 2000 prescribes regular instrument testing and calibration. To help meet required stringent alignment tolerances, a modern calibration bench has been developed for the calibration of survey instruments under internationally recognised COFRAC accreditation. Surveyors must as professionals fulfil certain legal, regulatory and/or accuracy requirements for their clients. They will typically strive to do so in an optimally cost-effective way and with the most appropriate equipment for the job at hand. This naturally requires good understanding of and confidence in the instrumentation employed. Clients want the most from what they... (read more)
2007-07-07 12:00:00
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