Drill Through Earth: Antipode Finder

If you could drill straight through Earth, where would you emerge? The destination is your antipode: the exact opposite point on the globe.

Input Options Browser geolocation, place name, or raw coordinates

Core Math lat -> -lat, lon -> lon + 180 (wrapped)

Visualization D3 orthographic globes with both points and drill path

This page lets you use your current location or enter one manually, then computes the opposite side and draws both hemispheres with D3.

Steps

Set a starting location (browser geolocation, place name, or latitude/longitude).
Compute antipode with simple coordinate inversion and longitude wrap-around.
Render two globes: one centered on your location, one centered on the opposite side.

Manual input: place name

Or enter latitude/longitude directly.

Latitude (-90 to 90)

Longitude (-180 to 180)

Waiting for input.

Starting Point -

Antipode -

Surface Arc Distance -

Straight Through Distance ~12,742 km (Earth diameter)

Orange: start point. Blue: antipode. Left globe centers the start, right globe centers the opposite side.

Data sources: browser geolocation, OpenStreetMap Nominatim for place-name lookup, and world boundaries from world-atlas.