Antipode of Altona, U.S. Virgin Islands
The opposite side of the world to Altona is Dampier, Western Australia, Australia.
Altona
U.S. Virgin Islands
Continent: America
Coordinates: 18.339, -64.949
Antipodal point
Indian Ocean
Exact location on the other side of the world
Coordinates: -18.339, 115.051
Dampier
Australia
Dampier is the closest city to Altona's antipodal point (311 km).
The antipodal city to Altona is Dampier. This means that, among all the populated locations in the world, the farthest city from Altona is Dampier.
The distance from Altona to Dampier 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 Altona
This table contains the populated locations that are closest to Altona's antipode. These are the farthest cities in the world from Altona.
| City | Country | Distance from antipode | Coordinates |
|---|---|---|---|
| Dampier, WA | Australia | 311 km | (-20.663, 116.713) |
| Nickol, WA | Australia | 323 km | (-20.746, 116.795) |
| Baynton, WA | Australia | 324 km | (-20.752, 116.801) |
| Millars Well, WA | Australia | 324 km | (-20.742, 116.817) |
| Pegs Creek, WA | Australia | 325 km | (-20.738, 116.833) |
| Bulgarra, WA | Australia | 325 km | (-20.726, 116.857) |
| Karratha, WA | Australia | 326 km | (-20.738, 116.846) |
| Karratha Industrial Estate, WA | Australia | 330 km | (-20.772, 116.869) |
| Wickham, WA | Australia | 339 km | (-20.675, 117.138) |
| Roebourne, WA | Australia | 348 km | (-20.772, 117.146) |
Local time:
Time Zone: America/St_Thomas
Coordinates: 18.3389° N 64.9488° W
Elevation: 14 m (46 ft)
Local time:
Time Zone: Australia/Perth
Coordinates: 20.6628° S 116.7126° E
Elevation: 31 m (102 ft)
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 Altona
The DMS coordinates are: 18°20'19.9'' N 64°56'55.5'' W.
Calculations are easier by using the decimal format, hence:
LatO = 18.33885°
LngO = -64.94876°
Step 2: Calculate the latitude
LatA = - LatO = -18.33885°
Since the latitude is positive (north direction), the antipode must be negative (south direction).
Step 3: Calculate the longitude
LngA = LngO ± 180° = -64.94876 + 180° = 115.05124°
Since the longitude is negative, we sum 180° to ensure the final value lies between (-180, 180). If it were the other way around, we would subtract 180° for the same reason.
Result:
The antipode of Altona is located on coordinates: (LatA, LngA) = (-18.33885, 115.05124)
In DMS format: 18°20'19.9'' N 64°56'55.5'' W.