Fish's video: Intervisibility explained

Geography mapwork / map reading: How to determine intervisibility on a topographic map by looking at contour lines/elevation. Feel free to click the link below: How to draw a cross section: https://www.youtube.com/watch?v=9w-KOodmiZc&t=157s How to calculate gradient: https://www.youtube.com/watch?v=3b3yGololaY&t=1s Topographic maps basics: https://www.youtube.com/watch?v=MbK035so8Yg&t=15s How to identify relief features on topographic maps: https://www.youtube.com/watch?v=q2lJZV1yC6o Relief features summary: https://www.youtube.com/watch?v=ygrClDH2WFs&t=12s Contour lines and relief features in google maps: https://www.youtube.com/watch?v=qQzrA3TfhtM All of the videos above in one playlist: https://www.youtube.com/playlist?list=PLt71K0lJFEltXWVvezwl8sZT7EZMB5Ise Full mapwork/map reading/map skills playlist: https://www.youtube.com/playlist?list=PLt71K0lJFEluBHCxlYv2tbtAqUSIKZSM8