Antipodes
Antipodes Finder — What's on the Other Side of the World?
“If I dug a tunnel straight through the Earth, where would I come out?” Pick a country and get the exact antipode — the land-or-ocean verdict, the nearest coast and how far it is. Spain's answer: New Zealand.
Loading country geometry…
The map
Flat world map (equirectangular) — the highlighted country is your selection, the pin marks its antipode.
The other side of the world
| Selected country | Spain |
|---|---|
| Antipode coordinates | 40.2° S, 175.5° E |
| Landfall | Falls on land in New Zealand |
| Nearest land | New Zealand, about 38 km away |
Only about 15% of Earth's land is antipodal to other land — an ocean antipode is the norm, not the exception.
How this tool works
- Pick a country. The tool computes its representative center point — the vertex average of the largest boundary ring in the Natural Earth 1:110m dataset (the same approximate centroid every GlobeVS tool uses).
- The antipode is pure geometry: mirror the latitude (40° N becomes 40° S) and shift the longitude by 180° (3.7° W becomes 176.3° E). That is the exact point you would surface at after digging straight through the planet.
- A point-in-polygon test decides whether the antipode falls inside a country's national polygon. When it misses — the common case — the tool scans every boundary edge of all countries and reports the closest coast with its distance.
- The world map highlights your selection and drops a pin on the antipode. The state lives in the URL (?country=…), so every answer is a shareable link — no account, no backend.
The selected country lives in the URL (?country=spain), shareable, indexable URL-as-state (D4).
Data & method
Country boundaries come from Natural Earth 1:110m (public domain), the same frozen dataset every GlobeVS surface ships. The antipode itself is exact geometry. "Falls on land in X" means the antipode falls inside X's national POLYGON — lakes are not carved out, coastline slivers follow the coarse 1:110m generalization, and v1 does not attempt to name the ocean on a miss. The nearest-country distance is an equirectangular point-to-boundary-edge approximation (longitudes scaled by cos of the query latitude) — accurate to a few percent at country scale, which is the right precision for "how far is the nearest coast". The origin point is the vertex-average centroid of the country's largest ring, not a demographic center. The whole computation runs in your browser over the same pure functions the embeddable view and the GlobeVS MCP tool call, so all three surfaces answer identically.
The computation itself is a JavaScript enhancement — without it you can still read the guide, the data note and the FAQ, and the panel above shows a worked example computed at build time.
Sources
Embed this tool
Add the antipodes finder to your own site: paste the snippet below into your HTML and it loads the same interactive tool inside an iframe, with a small non-removable “Powered by” attribution link back to this page. The embed is available in English.
<iframe src="https://globevs.com/embed/antipodes" width="800" height="600" title="Antipodes Finder — GlobeVS" loading="lazy" style="border:0;max-width:100%" sandbox="allow-scripts allow-same-origin allow-popups"></iframe>FAQ
What exactly is an antipode?
The antipode of a point is the unique spot on the exact opposite side of the Earth: the point you would emerge at after digging a tunnel straight through the planet's center. Geometrically it mirrors the latitude across the equator (40° N → 40° S) and shifts the longitude by 180° (3.7° W → 176.3° E). For Spain that lands in New Zealand — the pairing this page opens with.
Why do so few countries have land antipodes?
Because the oceans win. Water covers about 71% of Earth's surface, and the continents' distributions are lopsided: the antipode of the enormous northern-hemisphere landmasses is mostly southern-hemisphere ocean. Only roughly 15% of Earth's land is antipodal to other land (a commonly cited estimate), and very few populated places sit on a land-land pairing — the Iberian peninsula and New Zealand, and Argentina/China's interior are the textbook examples. If your country's antipode is open water, you are in the overwhelming majority.
How is the landfall decided, and how is the nearest distance computed?
Landfall is a planar point-in-polygon test (even-odd ray casting) over the Natural Earth 1:110m national boundaries, split at the antimeridian first so rings that cross ±180° behave. "Land" therefore means a country polygon — lakes are not excluded and no ocean names are reported. When the point misses, every boundary edge of the dataset is scanned for the closest approach: a point-to-segment distance in an equirectangular frame (longitude scaled by cos of the point's latitude), converted to km. Expect accuracy of a few percent at country distances.
My country's antipode is in the ocean — is the tool broken?
No — that is the honest answer for most of the world. If the antipode misses every national polygon, the tool reports the nearest country and how far its boundary is. The distance is measured to the closest point of the closest country's coastline, so a "nearest coast: 60 km" result really means the antipode splashed down just offshore.
Where does the data come from?
Country boundaries from Natural Earth 1:110m (public domain, 176 countries here), metadata from mledoze/countries (ODbL), frozen into this site at build time. The geometry runs in your browser — the page, the embeddable view and the GlobeVS MCP tool share one computation core, so an answer can never differ between surfaces.
Related
Put the two ends side by side across 46 indicators in Country Compare →
Digging not planned? Measure the straight-line distance instead — Country Distance →
See how the two ends really compare in size — True Size Comparison →