Southern Mapping

 

 
PositionIT e-News
 
GIS, GPS, surveying and spatial applications in Southern Africa

     Issue  32,  Aug/Sept 2011 

Innovation versus quality
by Clare van Zwieten, EE Publishers
        
Clare van ZwietenCollaborative data collection, more commonly known as crowdsourcing, has taken off. Traditionalists question the quality of this data but where its strength lies, particularly in the mapping world, is in the ability of enthusiastic volunteers to provide specific details on areas that aren't covered by commercial or public sector mapping organisations... (more)
Land governance in support of the global agenda
by Prof. Stig Enemark, past president of FIG
  
Stig EnemarkInternational development over the last 10 to 15 years in the area of cadastre has been remarkable, leading towards a more holistic understanding of land administration in support of sustainable development. Recently this has developed further into land governance in support of the global agenda such as the Millennium Development Goals... (more)
Surveying on a moving vessel
by Mark Newling, Tritan Survey
  
This article looks at some of the problems when surveying and scanning on a floating ship using examples experienced while surveying a pipe-laying vessel in the Cape Town docks. These problems relate firstly to the movement of the ship in relation to the earth's gravity... (more)
Using tide gauges to monitor long-term sea level change
by John Hannah, University of Otago
  
When tide gauge records are examined in order to determine the long-term trends in sea level it is typical for a single number representing the derived trend, to be quoted. However, there appears to be a widespread ignorance as to the fragility of tide gauge records and hence the accuracy... (more)
Interacting with Google Earth
by Wim Stapelberg, Model Maker Systems
   
Model Maker outputs to Google Earth all survey points with a description, contours, CAD, strings and irrigation data. With this tool you can capture the current display, as seen in Google Earth, into Model Maker as a background image. The image will be loaded at the correct position for you to start working... (more)
 
Road connectivity and its impact on crop production
by Paul Dorosh, Hyoung-Gun Wang, Liangzhi You, and Emily Schmidt,
Consultative Group on International Agricultural Research (CGIAR)

 

Much of Africa's rural population lives in remote areas. These populations have difficulties accessing services in urban areas. In recent years, however, many sub-Saharan Africa governments have made progress through large scale investments in road infrastructure that have dramatically reduced travel times... (more)

Integrated digital imaging and its impact on survey workflows
by Werner Lienhart, Leica Geosystems

 

The latest innovations which change the standard surveying workflow are the seamless integration of digital imaging information. In addition, challenging measurements like steep sightings can now be made without additional accessories and we discuss new possibilities in the remote control of a total station... (more)

3D machine control for design and construction 
Information from CLM Positioning Solutions

 

Leading Danish contractor Danjord decided to leverage 3D grade control technology for the construction of a premier golf course

at Kildebjerg Ry in Denmark. Danjord is a contractor specialising in land development, paving, road works and drainage systems... (more

GNSS: reliance and reliabilities (Part 1)
Information from the Royal Academy of Engineering

 

The Royal Academy of Engineering became alarmed by a report in May 2009 from the US General Accounting Office (GAO) which concluded that the United States Air Force would have difficulty in maintaining its investment in the Global Positioning System (GPS) and in launching new satellites to schedule and cost... (more

Managing solar effects in GNSS operations
Information by Edwin Danson, C&C Technologies 

 

Every eleven years or so, the sun goes through a cycle of change from minimum activity, through a maximum and back again. As the sun approaches its maximum, the heightening of solar activity generates electromagnetic disturbances that impact here on Earth... (more

Industry and institute news

Training news

Geomatics thesis research at UCT
Company and product news

New converged infrastructure solutions
Jamming detect GPS Module
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In this issue...
- Innovation versus quality
- Land governance in support of the global agenda
- Surveying on a moving vessel
- Using tide gauges to monitor long-term sea level change
- Interacting with Google Earth
- Road connectivity and its impact on crop production
- Integrated digital imaging and its impact on survey workflows
- 3D machine control for design and construction
- GNSS: reliance and reliabilities (Part 1)
- Managing solar effects in GNSS operations
- Industry and institute news
- Training news
- Company and product news
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