Reconstructing a Church in 3D

Combining Terrestrial Lidar and UAS Photogrammetry into One Unified Model
Reconstruction and maintenance work in historical buildings such as churches requires detailed and accurate information about them, but it can be difficult and expensive to acquire such data efficiently. The combination of terrestrial Lidar and UAS-based photogrammetry provides an adequate approach for gathering a full model of the outside of a church. Additionally, it allows for accuracy evaluation by comparing areas with overlap between terrestrial Lidar and the point cloud derived from the UAS images. Read on to learn about a project at the 13th-century Cathedral of St. Nicholas in Greifswald, Germany. The imposing Cathedral of St. Nicholas in Greifswald, Germany, dates... (read more)
2016-03-18 10:05:58

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

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

Turning UAV and Lidar into Something Beautiful

YellowScan International User Conference 2017
Mounting Lidar on an unmanned airborne vehicle (UAV) is regarded by many as the next geospatial frontier, but gradually the barriers are being overcome. Scientists and Lidar- and UAV-adopters from surveying companies gathered at the second YellowScan User Conference in Montpellier, France, to discuss the future of this novel and promising geodata acquisition technology. The diverse backgrounds of the over 80 attendees reflect the potential of equipping UAVs with Lidar sensors, resulting in what may be called UAS-Lidar. The venue – Château de Flaugergues, built between 1696 and 1730 – added an extra dimension to the two-day conference, held on 29... (read more)
2017-07-26 11:13:46

Mapping the Seafloor with Remote Sensing and Satellite Imagery

An Analysis of the Techniques and Benefits of These Methods
70% of the Earth is covered by water, but so far just 7% of it has been surveyed (Mars, Venus and the Moon are better surveyed). Hydrography as a science has changed dramatically since the first measurements were made by Alexander Dalrymple and James Cook with lead lines and sextants. Singlebeam echosounders were invented in the 1920s – a technology still used today for mapping the seafloor. This method of using echosounders can produce very high-resolution bathymetric data but the high operational costs and the slow working process make it economically unsuitable for covering large areas. However, with the ongoing expenses of... (read more)
2018-06-19 09:23:54

Geomatics Education in Croatia

Developments in Geomatics Education (1)
During the past year the Faculty of Geodesy at the University of Zagreb has introduced fundamental reform of all its education programmes, undergraduate, graduate and postgraduate doctoral studies, and established a completely new postgraduate specialisation course. The author provides detailed background information and preliminary evaluation. Croatia has a longstanding tradition of higher education in surveying and geodesy. The seminal textbook by Martin Sabolovi´c, Exercitationes Gaeodeticae, was printed in 1775 and the first academic diplomas certifying that one could act as surveyor date back to 1811. At the Royal Forestry Academy, founded in Zagreb in 1898, geodesy was from the start... (read more)
2007-02-23 12:00:00
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