Horizon Finder

Use this tool to find where the visible horizon is from a point on earth using a map to show the area covered.

Horizon Finder Map

[Map Height : Small - Medium - Large - Full Screen]

Height above ground m OR Estimate elevation and use this as height

Radius of last search (distance to horizon) : km

 Clear Map 

Introduction

This tool can be used to see the area covered by the visible horizon from a given location. As the height of the base point is changed, the visible horizon will change to suit. You can either specify a height manually or let this tool estimate the height and produce the visible horizon polygon automatically.

This will allow you to find out the distance covered by line-of-sight to the horizon.

Notes

This tool assumes there is nothing obstructing the horizon and the horizon itself is at zero elevation. In practice there may well be mountains or hills that make the visible horizon closer, or mountains or hills that start behind the visible horizon but rise up above it to become visible.

Instructions

To use the horizon finder tool:

  • Decide if you wish to use the automatic elevation finder to estimate the elevation from the location or input the elevation manually
  • Zoom and pan the map to find the desired location
  • Click on the map to place a marker
  • You will then see a visual representation of where the visible horizon is
  • Click again to place further markers
  • You can find the elevation of any old marker by hovering over the marker with your mouse

External References

Horizon on Wikipedia

Version History

  • 8th January 2016 - Initial Version

Comments For This Page

I'm just seeing circles of various size, as if the Earth were a sphere. Am I missing something?
On 24th January 2017

Useful tool
By John B on 4th March 2016

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