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THE FEUTEX TOOLKIT

Geometric Horizon Distance

Estimate geometric horizon range and angular dip from observer altitude.

Geospatial workspace● Runs in your browser
01 Your input
02 Your result
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FormulaLine-of-sight distance = sqrt(height*(2*radius+height)); Surface distance to horizon = radius*acos(radius/(radius+height)); Horizon dip = acos(radius/(radius+height))*180/PI
Sources and model references

How to use this tool

  1. Estimate geometric horizon range and angular dip from observer altitude.
  2. Set observer altitude, sphere radius in the indicated units.
  3. Calculate and compare line-of-sight distance, surface distance to horizon, horizon dip.

Try this example

{
  "height": 0.1,
  "radius": 6371
}

Accuracy and scope

Spherical geometry without atmospheric refraction, terrain or structures.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.