Flat Earth Resources
Flat Earth Sources on Youtube
Flat Earth Text Sources on Internet
The Flat Earth Society (also but different)
Globe Earth Sources
Globe Earth Channels Youtube
Vsause A popsci channel
Round Earth Text
Tools
Walter Bislin's curve Calculator
SunCalc.org (to find angles of sun at specific time and place
The Complete Circular Arc Calculator
PeakVisor : What's the name and the altitude of that mountain?
Create a visualisation of what you would see from a specific viewpoint
See Rory's video on how to use peakfinder,Peakvsior Panorama