RE: [OpenMap Users] scale help

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@bbn.com [mailto:owner-openmap-users@bbn.com]On
Behalf Of MNewcomb@tacintel.com
Sent: Wednesday, August 04, 2004 3:02 PM
To: openmap-users@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

--
[To unsubscribe to this list send an email to "majdart@bbn.com"
with the following text in the BODY of the message "unsubscribe openmap-users"]
--
[To unsubscribe to this list send an email to "majdart@bbn.com"
with the following text in the BODY of the message "unsubscribe openmap-users"]