Shedding Light on the Land Sector

How Open Data for Cadastral Records is Gaining Traction
Despite the enormous importance of good land governance for sustainable economic growth and social justice, land administration remains a sector that is lacking openness and transparency in many parts of the world. Land registry and cadastral records are often deemed too sensitive to share, unless acquired for a fee, or the records themselves may be unreliable or in formats that are not easily accessible. In geographies where the rule of law may not be strong, this presents opportunities for government abuse and corruption. A 2013 study by Transparency International found that one in five people around the world reportedly had... (read more)
2017-05-19 10:10:12

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

Mobile Laser Scanning in Venice

Grand Canal in Scan- and Image Data
High measurement rates and centimetre precision point-clouds are state-of-the-art in mobile laser scanning. The introduction of photogram­metric features as next logical step considerably expanded the horizon of potential applications. Digital 3D documentation of Venetian cultural heritage as represented by the Grand Canal has until recently been achieved only for a few individual buildings. Now, in a collaborative project carried out by Universitá IUAV di Venezia and mobile-scanning system VMX-250 manufacturer RIEGL Laser Measurement Systems, the entire Grand Canal area has been registered in time-stamped image and scan data, complete with precise location and position data. The IUAV CIRCE Photogrammetry Lab... (read more)
2011-03-28 03:27:18

Indoor Location: the Mobile Revolution Starts Now

For more than 20 years, the use of global positioning system (GPS) has been the gold standard for outdoor navigation. The satellite-based navigation system has become an indispensable tool for anyone wanting to determine their location outside a building, whether driving on roads or motorways or walking down the street. More recently, cell-phone manufacturers have added GPS capabilities to mobile devices, which in turn has created new opportunities for existing location-based services (LBS) such as mapping and navigation.   By Christian Carle, CEO and founder of Pole Star While the quick rise of smartphones, and the easy access to more... (read more)
2013-06-10 12:34:24

The Need to Integrate BIM and Geoinformation

Building Information Modelling: Essentials and Issues
In the construction industry, business relationships are often short term and one-off. There are many unique processes and activities. The resulting complexity and fragmentation may obstruct quick and effective exchange and integration of information and thus hamper project progress. Building information modelling (BIM) is aimed at preventing mismatches in information exchange between the many stakeholders. Although BIM has come a long way in this respect, there are still challenges to overcome. The authors explain the essentials of BIM and discuss issues. (By Sisi Zlatanova, The Netherlands, and Umit Isikdag, Turkey) Building Information Modelling (BIM) evolved from supporting the design and... (read more)
2016-10-19 05:02:23

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

Poles from Point Clouds

Automatic Extraction of Pole-like Objects Using Point Cloud Library
Currently, the extraction of objects from point clouds of urban sites is commonly done manually as automation is impeded by noise, clutter, occlusions and varying point density. The authors have developed a software tool for automatic detection of road signs, lampposts, utility poles, traffic lights and other pole-like objects based on the open-source Point Cloud Library. The results appear to be encouraging. By Federico Tombari, Tommaso Cavallari and Luigi Di Stefano, University of Bologna, Italy 3D information about pole-like structures is used for detecting facility damage, road maintenance and other applications. Occlusion – the blocking of objects by other objects... (read more)
2016-01-05 03:47:32

Flexible Land Tenure in Namibia

Offering Registration to Informal Settlers
The land surveying and registration system in Namibia covers only part of the country. There is frustration at the slow pace of planning, survey and registration of land rights and access to credit for investment and development. Many poor people lack any long-term security of tenure, having no rights to the land upon which they have settled in rapidly expanding urban areas. The author, an advisor to the Namibian Government, discusses the current situation. Poor rural people coming to urban areas in search of better opportunities have difficulty in finding vacant land on which to settle. Others are uncertain about... (read more)
2005-03-18 12:00:00

Surveying the Past Using a Drone

Modelling the Caesar’s Camp Oppidum under Dense Cover
Archaeology has long been reliant on ground-level geophysical disciplines and aerial photographs shot from an aircraft or ultralight. Airborne observations not only enable remains that are invisible on the ground to be detected and studied in a non-destructive way, but also to pinpoint where reconnaissance probes or excavations should be performed. If a site is covered by dense vegetation, Lidar is the only tool practicable for aerial observation. Lidar was applied in a unmanned aerial system (UAS or ‘drone’) survey of the site known as ‘Caesar’s Camp’, situated in the French municipality of Changé/Saint-Piat, located 2km south of Maintenon. The... (read more)
2018-02-01 09:17:39
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