The ratio will depend a lot of the length of the route: Longer routes
will generally have a ratio closer to 1. Urban routes is also likely to
be closer to 1, since the road network is more dense in towns.

Mine is 6.2 km / 5.6 km = 1.11. This is very close to a straight line,
when you look at a map.

Kind regards

Uffe Kousgaard
www.routeware.dk


----- Original Message ----- 
From: "Christof Kaiser" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, April 02, 2004 4:08 PM
Subject: MI-L weekend question: ratio between like the crow flies and
road distance


Hi out there,

on my push bike, I have a Garmin Geko 201 mounted on, which is a
wonderful device.
Since it does not have street data on it, I am navigating with compass
directions.
The remaining distance the unit returns to reach the desired waypoint is
of course like the crow flies.
However, as a cyclist, I stick to the roads.

Does anybody have experiences which the common ration between the
straight distance and the road distance is?
Sure, you are right if you say: depends on the road network!
However, for the region I am living in ( 7�13'13"E  51�29'18"N ), I
experienced a more or less constant factor around 1.45 .
To make it sound more scientific, I ll simply call it square route(2).

Does anybody have values for other regions?

Cheers
Christof


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