This is a perspective projection like the general perspective, but with the difference that the point of perspective lies in infinite distance. It is therefore often used to give the appearance of a globe viewed from outer space, were one hemisphere can be seen as a whole. It is neither conformal nor equal-area and the distortion increases near the edges.
lon0/lat0 specifies the projection center, the optional parameter
specifies the max distance from projection center (in degrees, <= 90, default 90)
Total running time of the script: ( 0 minutes 0.666 seconds)