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<DIV><FONT size=2 face=Arial>Even a relation adds no information to the map,
other than perhaps "these are points on the surface of the earth which allow for
an unobstructed atmospheric path to be calculated between".</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial> There are about 28,000
aeroway=aerodrome tags, and 12,000 runways tagged. So if we wish to
add relations between all possible airports, that represents about 72,000,000
great circle relations that would need to be added to cover them
all.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV style="FONT: 10pt Tahoma">
<DIV><FONT face=Arial></FONT><BR></DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A
title="mailto:lists@gimnechiske.org
CTRL + Click to follow link"
href="mailto:lists@gimnechiske.org">Aun Johnsen</A> </DIV>
<DIV><B>Sent:</B> Sunday, October 10, 2010 10:34 AM</DIV>
<DIV><B>To:</B> <A title=talk@openstreetmap.org
href="mailto:talk@openstreetmap.org">OpenStreetMap</A> </DIV>
<DIV><B>Subject:</B> Re: [OSM-talk] Flight "paths" in OSM</DIV></DIV></DIV>
<DIV><FONT size=2 face=Arial></FONT><BR></DIV>If there is any interest of
mapping airline routes, than do it with a relation between the airport nodes, as
great circles can easily be calculated between two known positions. Making lines
on the map is easy enough when you have the end positions, and nodes in between
is not necessary at all.<BR><BR></BODY></HTML>