## Azimuthal Equidistant Projection

An Azimuthal Projection which is neither equal-Area nor Conformal. Let and be the Latitude and Longitude of the center of the projection, then the transformation equations are given by

 (1) (2)

Here,
 (3)

and
 (4)

where is the angular distance from the center. The inverse Formulas are
 (5)

and

 (6)

with the angular distance from the center given by
 (7)

References

Snyder, J. P. Map Projections--A Working Manual. U. S. Geological Survey Professional Paper 1395. Washington, DC: U. S. Government Printing Office, pp. 191-202, 1987.