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Geographic Antipode Calculator

Antipode Formula:

\[ \text{antipode\_lat} = -\text{lat}, \quad \text{antipode\_lon} = \begin{cases} \text{lon} + 180 & \text{if lon} < 0 \\ \text{lon} - 180 & \text{otherwise} \end{cases} \]

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1. What is a Geographic Antipode?

The antipode of any place on Earth is the point on the Earth's surface that is diametrically opposite to it. It's the location you would emerge if you dug a straight tunnel through the center of the Earth.

2. How Does the Calculator Work?

The calculator uses the antipode formula:

\[ \text{antipode\_lat} = -\text{lat}, \quad \text{antipode\_lon} = \begin{cases} \text{lon} + 180 & \text{if lon} < 0 \\ \text{lon} - 180 & \text{otherwise} \end{cases} \]

Where:

Explanation: The antipode is calculated by inverting the latitude (changing its sign) and adding or subtracting 180° from the longitude to keep it within the -180° to 180° range.

3. Importance of Antipode Calculation

Details: Knowing antipodes is useful in geography, seismology (earthquake analysis), and for understanding day/night patterns. It's also interesting for travel planning and understanding global relationships between locations.

4. Using the Calculator

Tips: Enter latitude (-90 to 90) and longitude (-180 to 180) in decimal degrees. Positive values are North/East, negative values are South/West.

5. Frequently Asked Questions (FAQ)

Q1: What's the antipode of my location?
A: Enter your coordinates to find out! For example, the antipode of New York City is in the Indian Ocean near Australia.

Q2: Are there land antipodes?
A: Yes, but rare. About 4% of land areas have land antipodes, mostly between South America and East Asia.

Q3: What's special about antipodal points?
A: They have exactly opposite seasons and time zones (12 hours difference). When it's noon at one point, it's midnight at its antipode.

Q4: How accurate is this calculator?
A: It provides mathematically precise antipodes based on spherical Earth model (WGS84).

Q5: Can I find antipodes of major cities?
A: Yes! Try coordinates of famous cities to discover their antipodal locations.

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