Antipode of Udon Thani, Thailand
The opposite side of the world to Udon Thani is San Juan, Ica, Peru.
Udon Thani
Thailand
Continent: Asia
Coordinates: 17.416, 102.786
Antipodal point
Opposite side in the world
Continent: Asia
Coordinates: -17.416, -77.214
San Juan
Peru
San Juan is the closest city to Udon Thani's antipodal point (315 km).
The antipodal city to Udon Thani is San Juan. This means that, among all the populated locations in the world, the farthest city from Udon Thani is San Juan.
The distance from Udon Thani 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 Udon Thani
This table contains the populated locations that are closest to Udon Thani's antipode. These are the farthest cities in the world from Udon Thani.
| City | Country | Distance from antipode | Coordinates |
|---|---|---|---|
| San Juan, Ica | Peru | 315 km | (-15.365, -75.162) |
| Minas de Marcona, Ica | Peru | 332 km | (-15.212, -75.110) |
| Yauca, Arequipa | Peru | 346 km | (-15.661, -74.527) |
| Atiquipa, Arequipa | Peru | 353 km | (-15.796, -74.364) |
| Acarí, Arequipa | Peru | 355 km | (-15.424, -74.614) |
| Chala, Arequipa | Peru | 360 km | (-15.866, -74.247) |
| Changuillo, Ica | Peru | 372 km | (-14.664, -75.223) |
| Nazca, Ica | Peru | 376 km | (-14.831, -74.939) |
| Ocucaje, Ica | Peru | 378 km | (-14.349, -75.669) |
| Llipata, Ica | Peru | 382 km | (-14.563, -75.207) |
Udon Thani, Thailand
Local time:
Coordinates: 17.4157° N 102.7859° 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 Udon Thani
The DMS coordinates are: 17°24'56.4'' N 102°47'9.2'' E .
Calculations are easier by using the decimal format, hence:
LatO = 17.41567°
LngO = 102.78589°
Step 2: Calculate the latitude
LatA = - LatO = -17.41567°
Since the latitude is positive (north direction), the antipode must be negative (south direction).
Step 3: Calculate the longitude
LngA = LngO ± 180° = 102.78589 - 180° = -77.21411°
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 Udon Thani is located on coordinates: (LatA, LngA) = (-17.41567, -77.21411)
In DMS format: 17°24'56.4'' N 102°47'9.2'' E .
