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plover's Journal: Game time! 9

Journal by plover
Thanks to this posting, Rupert and I are now playing a game: Find the highest Google maps route distance to great circle distance ratio.

Rupert started it with this:

Fairbanks to St. Petersburg.
Great circle distance: 3,840 miles
Google directions distance: 9,631 miles
My score: 2.508

I answered by stretching his route slightly: Kantishna Station, Alaska to Skarsvag, Norway. It's a pretty long journey no matter how you look at it.

Google's route: 10,411 miles
Great circle distance: 3,141 miles
It has a score of only 3.315, but it'll take 34 days to make the journey!

This one seemed like a good North American entry:
Google's route
gets a score of 3.7.

But North America is tricky. Just about every goat and Jeep trail is mapped, and we Americans cannot abide straight lines that aren't paved. Rupert's still managed to find some good ones: Route to distance gives a very respectable 5.6.

I've headed over to the Balkans, where the maps are usefully short on detail. Here's my latest entry. Lecce, Italy to Tirane, Albania: Route to great circle.

1267 km by Google, 216 km straight arc. Score is 5.866.

It's kind of a pain because you have to snarf the lat/lon from Google's URL and adapt it to the great circle calculator, but it's fun to exploit holes in Google's map coverage.

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Game time!

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