Thread Subject: Solve for start/end lat/lon for 3 parallel lines on a map with the same heading

I have a map that I need to extract 3 topographic profiles from, North, Central and South. The profiles need to be 1) the same length, 2) parallel to each other and 3) all of them must have a heading of 100°. The spacing between the profiles must be equal, though I will have to play a bit to provide the exact spacing. For now, let's say 40 km.

All I really need is the start and end lat/lons for each profile, then I can run them through some built in functions to extract the depth, that part is no problem.

I am pretty proficient in MATLAB and mapping in general, but I am really at a loss of how to start this. Pointers?

"Corey Scheip" wrote in message <j8p05b$as4$1@newscl01ah.mathworks.com>...
> I have a map that I need to extract 3 topographic profiles from, North, Central and South. The profiles need to be 1) the same length, 2) parallel to each other and 3) all of them must have a heading of 100°. The spacing between the profiles must be equal, though I will have to play a bit to provide the exact spacing. For now, let's say 40 km.
>
> All I really need is the start and end lat/lons for each profile, then I can run them through some built in functions to extract the depth, that part is no problem.
>
> I am pretty proficient in MATLAB and mapping in general, but I am really at a loss of how to start this. Pointers?

Assuming you have the Mapping Toolbox, take a look at the reckon function. This will allow you to calculate coordinates a given range and azimuth from a starting point, either along great circles or rhumb lines.

-Kelly