When you're using QGIS, or in fact any GIS software or spatial analysis tool, you just need to be aware of the fact that coordinate reference systems (CRS) exist and that they're important. Why? Because if you're not aware of this and you do some analysis on data that is incorrectly projected then you may very well get nonsense results! Take a look at the video to see what I mean.

500 miles from Chipping Norton? Let's find out.

Read more here: https://www.practicaldatascience.org/...

See my intro and intermediate QGIS courses for more: https://www.udemy.com/user/alasdairr...

Useful reference: http://cartonerd.blogspot.com/2014/05...