Observed arrival · 2026-09-15
A Viewshed Tool That Takes Forests Seriously
An interactive line-of-sight map that calculates what terrain, buildings, and forest canopy can hide from a chosen point.
○Open
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$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
Field notes
The calculator combines elevation with optional OpenStreetMap buildings and woodland, then applies observer and target heights to determine terrain visibility. Its controls cover a 200 m–300 km radius and use logarithmic adjustment, while large circles are processed at coarser resolution. The page also describes a special Lithuania dataset based on 2020 satellite tree-height measurements, with a fallback canopy height for areas where only forest outlines are available.
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue