How do I simulate an evacuation route?

Open this page and use the live Great-Circle Distance tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.

Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.

Can I use my own numbers?

Absolutely — every input is adjustable, and with data import you can drive an evacuation route from your own measurements.

Use case · powered by Great-Circle Distance

Great-Circle Distance for an evacuation route

Simulate an evacuation route live in your browser. This runs the real Great-Circle Distance solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.

For:Students Researchers Educators Engineers Hobbyists & Makers K-12 Students First Responders

Great-Circle Distance (Haversine)Live

shortest path on a sphere

Controls

Presets

Point A latitude

Point A longitude

Point B latitude

Point B longitude

The shortest route between two points on Earth is a great-circle arc, not a straight line on a flat map. The haversine formula computes that distance from latitude and longitude, staying accurate even for nearly antipodal points. It powers flight planning, GPS, and every "distance between" feature — and explains why polar routes look curved on a Mercator map.

▶ Run in Python

Data Inspector

Distance5579 km

In miles3465 mi

Initial bearing51°

Governing equation

d = 2 R arcsin sin^{2} \frac{Δ φ}{2} + cos φ_{1} cos φ_{2} sin^{2} \frac{Δ λ}{2} = 5579 km

Reading this result: A great circle changes heading as you travel, so the 51-degree initial bearing is not the heading you keep — that constant-heading path (a rhumb line) would be longer.

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

or unlock everything with Pro →

About this simulation

The full Great-Circle Distance tool models an evacuation route with the same numerics engineers and scientists use — running entirely client-side. Change any parameter and the result updates in real time, so you can build intuition, check a design, or teach the concept without spreadsheets or installs.

More you can do with Great-Circle Distance

Great-Circle Distance for a GPS route Great-Circle Distance for a hiking trail Great-Circle Distance for a delivery zone Great-Circle Distance for a flight path Great-Circle Distance for a shipping lane Great-Circle Distance for a cell-tower map Great-Circle Distance for a flood zone Great-Circle Distance for a wildfire perimeter

Other ways to simulate an evacuation route

Map Projection for an evacuation route GPS Trilateration for an evacuation route Viewshed for an evacuation route Spatial Interpolation for an evacuation route Dead Reckoning for an evacuation route Rhumb Line for an evacuation route

Frequently asked questions

How do I simulate an evacuation route?: Open this page and use the live Great-Circle Distance tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.
Is it free?: Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.
Can I use my own numbers?: Absolutely — every input is adjustable, and with data import you can drive an evacuation route from your own measurements.