[Proj] Spheroidal gnomonic projection
Karney, Charles
ckarney at Sarnoff.com
Tue Jun 22 13:37:52 EST 2010
> From: Charles Karney [ckarney at sarnoff.com]
> Sent: Tuesday, June 01, 2010 13:42
>
> ...
> The method of constructing the projection entails defining
> ...
> * M, the geodesic scale. Take two geodesics of length s which are
> parallel close to the center and initially separated by dt. The
> endpoints are separated by M * dt.
>
> ... The geodesic scale was introduced (I think) by G. V. Bagratuni,
> ...
> Questions:
> ...
> (2) Is Bagratuni this first person to define M?
No, that would be Gauss (of course!). He uses the symbol n (which
Bagratuni adopts). See
http://books.google.com/books?id=a1wTJR3kHwUC&pg=PA35
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