WikiTerra · jsgraph

Geographic and astronomical visualization tools built on the wabis / jsgraph engine.

→ Earth Horizon Simulator Calculates and visualizes hidden height and horizon drop, globe vs. flat earth, with refraction. → Flat Earth Dome Model Interactive 3D simulation of the flat earth dome cosmology — sun, moon, eclipses, day/night cycle. → Sphere Drop Calc Three independent derivations (Pythagorean, circle-perimeter, trigonometric) of how much of a distant object hides below a spherical horizon.