Antipode of Nong Khai, Thailand
The opposite side of the world to Nong Khai is San Juan, Ica, Peru.
Nong Khai
Thailand
Continent: Asia
Coordinates: 17.878, 102.742
Antipodal point
South Pacific Ocean
Exact location on the other side of the world
Coordinates: -17.878, -77.258
San Juan
Peru
San Juan is the closest city to Nong Khai's antipodal point (357 km).
The antipodal city to Nong Khai is San Juan. This means that, among all the populated locations in the world, the farthest city from Nong Khai is San Juan.
The distance from Nong Khai to San Juan is about 20,000 kilometers. A direct flight would take around 22 hours, but there aren't commercial routes between these cities.
Cities on the other side of the world of Nong Khai
This table contains the populated locations that are closest to Nong Khai's antipode. These are the farthest cities in the world from Nong Khai.
| City | Country | Distance from antipode | Coordinates |
|---|---|---|---|
| San Juan, Ica | Peru | 357 km | (-15.365, -75.162) |
| Minas de Marcona, Ica | Peru | 374 km | (-15.212, -75.110) |
| Yauca, Arequipa | Peru | 381 km | (-15.661, -74.527) |
| Atiquipa, Arequipa | Peru | 385 km | (-15.796, -74.364) |
| Chala, Arequipa | Peru | 391 km | (-15.866, -74.247) |
| Acarí, Arequipa | Peru | 392 km | (-15.424, -74.614) |
| Tocota, Arequipa | Peru | 418 km | (-15.659, -74.091) |
| Changuillo, Ica | Peru | 417 km | (-14.664, -75.223) |
| Achanizo, Arequipa | Peru | 419 km | (-15.806, -73.967) |
| Nazca, Ica | Peru | 418 km | (-14.831, -74.939) |
Nong Khai, Thailand
Local time:
Coordinates: 17.8785° N 102.742° E
San Juan, Peru
Local time:
Coordinates: 15.3653° S 75.1622° W
How to calculate the antipodal point?
The antipode can be calculated by understanding the geographic coordinates and applying simple formulas. We will use the following variables:
- LatO: Latitude at the origin point.
- LngO: Longitude at the origin point.
- LatA: Latitude at the antipodal point.
- LngA: Longitude at the antipodal point.
Step 1: Obtain the geographic coordinates of Nong Khai
The DMS coordinates are: 17°52'42.5'' N 102°44'31.2'' E .
Calculations are easier by using the decimal format, hence:
LatO = 17.87847°
LngO = 102.742°
Step 2: Calculate the latitude
LatA = - LatO = -17.87847°
Since the latitude is positive (north direction), the antipode must be negative (south direction).
Step 3: Calculate the longitude
LngA = LngO ± 180° = 102.742 - 180° = -77.258°
Since the longitude is positive, we subtract 180° to ensure the final value lies between (-180, 180). If it were the other way around, we would sum 180° for the same reason.
Result:
The antipode of Nong Khai is located on coordinates: (LatA, LngA) = (-17.87847, -77.258)
In DMS format: 17°52'42.5'' N 102°44'31.2'' E .
