Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For First Responders · Viewshed

Viewshed for an evacuation route

Built for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field. Simulate an evacuation route live below — adjust the inputs and watch it respond, right in your browser.

Viewshed / Line of SightLive

what can you see from here?

Controls

Presets

Observer position

Observer height (m)

A viewshed marks every point visible from an observer, hidden behind intervening ridges. Scanning outward, a point is seen only if its angle above the horizontal exceeds every closer obstacle — so terrain shadows fall behind hills. Raising the observer reveals far more. It is essential for siting cell towers, wind turbines, scenic overlooks, and military positions.

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Data Inspector

Visible cells0

Coverage0%

Observer height10 m

Governing equation

d_{horizon} = 2 R h = 2 \cdot 6371 km \cdot 10 m \approx 11.3 km

Reading this result: At 10 m the observer sees over closer bumps but taller ridges still cast blind spots — coverage lands near 0%.

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Frequently asked questions

Is this good for first responders?: Yes — this version of "Viewshed for an evacuation route" is framed for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.