1.648 miles = 104417 inches (approx.)
480px / 72px/in = 6.667 inches
104417 / 20000 = 5.22 inches, which isn't that far off of 6.667.
Perhaps OpenMap uses a different assumption for pixels/inch?
-----Original Message-----
From: owner-openmap-users_at_bbn.com [mailto:owner-openmap-users_at_bbn.com]On
Behalf Of MNewcomb_at_tacintel.com
Sent: Wednesday, August 04, 2004 3:02 PM
To: openmap-users_at_bbn.com
Subject: [OpenMap Users] scale help
I'm looking at my OpenMap map at a scale of 1:20,000. What exactly is the
20,000? I'm just running the default OpenMap application (640x480) and I
used the distance tool to measure from one side of the window to the other
and it came out to ~1.648 miles. That isn't 20,000 anything (meters, feet,
centimeters, etc.).
So, what exactly is the scale a ratio of?
Thanks,
Michael
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Received on Wed Aug 04 2004 - 15:43:13 EDT