[rrrpdx1]

I had a slightly different question (that wasn't googleable), that you may be able to answer with the data you have.... What two points on earth are furthest from each other when taking into account the earth is an ellipsoid? I'm guessing Chimborazo and whatever is diametrically opposed to it, but is there anything else that's close?

[ianburrell]

There aren't that many antipodes on land. It is mainly South America to Southeast and East Asia. With New Zealand to Spain.

Chimborazo's antipode is Sumatra. That may be the best, unless there is peak in Indonesia that lines up with Andes in Columbia.

[tombh]

Do you mean like if you drew a line from the surface on one side of the planet, through the Earth's core, to the other side of the planet. What is the longest line that could do that?

[rrrpdx1]

Yup... Figured it would be interesting if two people stood on opposite sides of the earth and could claim they were as far apart as possible, or if someone visited both "antipoles" and stood at the locations that were furthest apart.