Bill,
Perhaps the easiest way would be to map using circles and a world map.
Find the map scale,
use a compass, and draw circles of the radius in miles indicated on the
map. Do that for
all the cities, and you'll figure out that the point is wherever all the
circles intersect.
Jonathan Watson
-----Original Message-----
From: bthoen [mailto:[EMAIL PROTECTED]]
Sent: Monday, April 23, 2001 1:30 PM
To: MapInfo-L
Cc: bthoen
Subject: MI-L A Mapping Puzzle for Savants
Here's an interesting mapping problem that was in this Sunday's
"Ask Marilyn" (newspaper) column.
Say you come upon a sign that says the following:
Paris 4658 miles
Moscow 5438 miles
Tel Aviv 6681 miles
Hong Kong 7878 miles
Sydney 8746 miles
Johannesburg 9092 miles
How would you determine where the sign is located?
Marilyn's hint:
"There's at least one easy way to determine the location of the
sign. Can you find it, kids? Send your solutions to
[EMAIL PROTECTED] We'll publish the earliest, simplest,
clearest reply that requires no sophisticated equipment (such as
online databases)."
Well, rats... that rules out using the sophisticated MapInfo!
It's not hard to get an approximate answer with MapInfo, but
intersecting buffers don't work well. Buffers are unreliable over
long distances? And obviously, she's looking for a simpler
solution, right?
I don't know "the" answer (but I think I have a pretty good
guess.) Her answer will be in next Sunday's paper (in the Parade
Magazine insert in any big US paper.)
- Bill Thoen
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