Enlarged sectionals?

(Ben Jackson) writes:

If it's for a route, plug in the address and airport here
http://aviationtoolbox.org/old/nearby_airports
and then select a "[sectional route]".

Is that not a great circle, or am I fooled by the projection of the map?

The tool that draws the route just uses the same technique any student
would; it draws a straight line. Sectional maps use the Lambert
Conformal Conic projection so a straight line should be close to
describing a great circle route.

--kyler

In article ,
Kyler Laird wrote:
(Ben Jackson) writes:

Is that not a great circle, or am I fooled by the projection of the map?

The tool that draws the route just uses the same technique any student
would; it draws a straight line. Sectional maps use the Lambert
Conformal Conic projection so a straight line should be close to
describing a great circle route.

Does that property of the LCC hold across large areas, like the whole
US? I happened to be plotting a course from Oregon to Georgia (in-laws
are moving to Atlanta) and it looked straight and too southerly to me
offhand.

--
Ben Jackson

http://www.ben.com/

(Ben Jackson) writes:

The tool that draws the route just uses the same technique any student
would; it draws a straight line. Sectional maps use the Lambert
Conformal Conic projection so a straight line should be close to
describing a great circle route.

Does that property of the LCC hold across large areas, like the whole
US?

Good question. I don't know the boundary conditions but certainly the
LCC does *not* work across "large" expanses. I think it can suffice
for the conUS, but the rotation required to stitch together the
sectionals might make it unusable in that way.

I suspect that I need to account for the rotations. I'll look into it
more.

Thank you.

--kyler