Standing on a hill, what can you actually see? A viewshed maps every point in view and every one hidden behind a ridge — and how much raising your vantage helps.
Viewshed / Line of SightLive
what can you see from here?
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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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How it works
A viewshed marks the terrain visible from an observer. Scanning outward, a point is seen only if its angle above horizontal beats every closer obstacle, so ridges cast shadows behind them. Raising the observer height uncovers far more ground. Viewshed analysis sites cell towers, wind turbines, scenic overlooks, and defensive positions.
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The math, the assumptions, real-world uses, or a code translation — explained for this exact simulation.
Yes. Viewshed / Line of Sight runs entirely in your browser using your device's own compute, so local use is free forever. You only pay Compute Tokens if you scale a job to the cloud.
Do I need to install anything?▾
No. Everything runs client-side in a modern browser — no downloads, no license, no account required to start.
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Create a free account to save projects, and use a shareable embed or minted DOI to publish a live, interactive version anywhere.
How accurate are the results?▾
The solver uses established numerical methods, but results are for research and educational purposes and should be validated against experiment or professional review before you rely on them.