1. Rory

    Calculator for viewing angles

    Please find attached an excel spreadsheet containing a calculator which works out the viewing (elevation) angles for an observer of a given height on both a flat and sphere earth, from distances and elevations. This is what it looks like: For the flat earth, it's simple trig - tan(x)=(target...
  2. Rory

    How can we explain perspective calculations simply?

    Perspective is difficult, both to understand and to explain. This was recently brought home to me listening to flat earthers Nathan Oakley and Anthony Riley attempt to explain this photo of mountains in Washington and Oregon: All decent analyses show that it aligns perfectly well with a globe...