Try 13,620 km Sierra Lieone to ZhangZhou I think their program need tweaking. See Google Earth

The progress report from March 2010, available at http://gcep.stanford.edu/research/factsheets/petesolor_results.html, provides a more detailed and understandable summary of what they are doing

I used the SRTM data extensively last year developing a program to identify set gradients for intelligent transport.

One liter of fuel passed through a small engine will provide enough energy to raise you to the height of Mount Everest.

From the top of Mt Everest a consistent 0.7% gradient will travel for over 1,000 km

Current technology, like an aero-dynamic coffin on rails, will roll down a 0.7% gradient at over 65 km/hr

That's 1,000 km/litre, or over 2,500 mpg, and the efficiency we need to be aiming for with our transport system

check it at http//www.megametrelitre.com

The earth's surface is on the inside surface of a sphere, light bends towards the centre, relativity is expanded so that the centre of the sphere is an infinite distance away and presto you have our reality.