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QGIS Techniques
Viewsheds & Advanced Calculations
Neil Benny
November 2016
So What’s New….
There’s a new QGIS….
thinkWhere’s new advanced
QGIS training courses…
http://www.thinkwhere.com/ for more ...
Heikki Vesanto
thinkWhere 2012 - 2016
Views & How to Analyse them….
More Robust Ways of Doing this….
• R.Viewshed
• Viewshed Plugin
Demonstration….
Advanced Analysis
Where is the Centre of Scotland?
West 141602
North 976821
East 414230
South 529982
277916,753401
Near Shiehallion
As with all things, how you frame the
question gets more interesting answers.
Population Centre
MEAN LOCATION
Mean Location
This effectively has to be a population weighted average x,y coordinate
of the centroid of each individual c...
Population Centre
MEDIAN LOCATION
Mean Location
The would be the centre point which divides the Scottish Population
into four equal parts
Slamannan
Scotland’s Heart
Viewsheds and Advanced Calculations
Viewsheds and Advanced Calculations
Viewsheds and Advanced Calculations
Viewsheds and Advanced Calculations
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Viewsheds and Advanced Calculations

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Neil Benny (thinkWhere) explains how to use the different viewshed tools built into QGIS and also the different ways to find the heart of Scotland. Presented at the 6th Scottish QGIS UK user group meeting.

Published in: Technology
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Viewsheds and Advanced Calculations

  1. 1. QGIS Techniques Viewsheds & Advanced Calculations Neil Benny November 2016
  2. 2. So What’s New…. There’s a new QGIS…. thinkWhere’s new advanced QGIS training courses… http://www.thinkwhere.com/ for more info….
  3. 3. Heikki Vesanto thinkWhere 2012 - 2016
  4. 4. Views & How to Analyse them….
  5. 5. More Robust Ways of Doing this…. • R.Viewshed • Viewshed Plugin
  6. 6. Demonstration….
  7. 7. Advanced Analysis Where is the Centre of Scotland?
  8. 8. West 141602 North 976821 East 414230 South 529982
  9. 9. 277916,753401 Near Shiehallion
  10. 10. As with all things, how you frame the question gets more interesting answers.
  11. 11. Population Centre MEAN LOCATION
  12. 12. Mean Location This effectively has to be a population weighted average x,y coordinate of the centroid of each individual census output area. Why the population weighting?
  13. 13. Population Centre MEDIAN LOCATION
  14. 14. Mean Location The would be the centre point which divides the Scottish Population into four equal parts
  15. 15. Slamannan Scotland’s Heart

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