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 info….
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 census output area.
Why the population weighting?
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
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