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.

1. QGIS Techniques
Viewsheds & Advanced Calculations
Neil Benny
November 2016

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. Heikki Vesanto
thinkWhere 2012 - 2016

4. Views & How to Analyse them….

7. More Robust Ways of Doing this….
• R.Viewshed
• Viewshed Plugin

8. Demonstration….

9. Advanced Analysis
Where is the Centre of Scotland?

10. West 141602
North 976821
East 414230
South 529982

11. 277916,753401
Near Shiehallion

12. As with all things, how you frame the
question gets more interesting answers.

13. Population Centre
MEAN LOCATION

14. 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?

16. Population Centre
MEDIAN LOCATION

17. Mean Location
The would be the centre point which divides the Scottish Population
into four equal parts

19. Slamannan
Scotland’s Heart