PPolySim OS
For Engineers · Search & Rescue Grid

Search & Rescue Grid for a tsunami

Built for engineers using it for real design work. Go from concept to a running model in the browser, then scale to the cloud when needed. Simulate a tsunami live below — adjust the inputs and watch it respond, right in your browser.

Viewshed / Line of SightLive

Controls

Presets

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.

▶ Run in Python

Data Inspector

Visible cells0
Coverage0%
Observer height10 m

Governing equation

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

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

2

Spatial Interpolation

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Spatial Interpolation (IDW)Live

Controls

Presets

Given scattered measurements — rainfall gauges, soil samples, air-quality sensors — inverse-distance weighting estimates values everywhere in between. Each sample's influence falls off with distance raised to a power: a low power gives smooth, blended surfaces; a high power makes each sample dominate its neighborhood in sharp bull's-eyes. The workhorse of GIS mapping.

▶ Run in Python

Data Inspector

Samples8
Power p2.0
Characterbalanced

Governing equation

Reading this result: At power 2.0 nearby samples win but distant ones still contribute — a balanced surface between smooth and spiky.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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More with Search & Rescue Grid

Frequently asked questions

Is this good for engineers?
Yes — this version of "Search & Rescue Grid for a tsunami" is framed for engineers using it for real design work. Go from concept to a running model in the browser, then scale to the cloud when needed.
Do I need to install anything?
No. It runs in any modern browser, free, with no account required.