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HorizonFocal LengthAstronomical

Horizon Calculator

It is intended that there will be three options produced for the horizon calculator. Intitially a simple text version where the user enters their height above sea level and the distance of the sea level horizon is displayed. Subsequently there will be a map-based calculator produced where the user can select a location on the map (including an offset, e.g. for the viewer's height or a tripod height) and a circle showing the sea-level horizon from that height will be displayed. Finally, a version will be produced that includes terrain analysis and should show the actual horizon (including mountains, etc.) visible from that point.

Text Calculator

Height above sea level  
Units
 
metres
feet

 
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