What is the best way to determine the coordinates of point B (let's say it's in a building or somewhere GPS doesn't work) based on the coordinates, distance, and bearing of point A? I'm specifically needing it for distances shorter than 100m. An example would be that I'm at the entrance to a cave where GPS works (Point A), but I need the coordinates of Point B at 50m with a heading of 90 degrees. Any help is much appreciated.
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