This section discusses some important characteristics of PF solutions
of Laplace's equation Kellogg (1953), and outlines
how these properties can be exploited to generate orthogonal
coordinate systems. Using the scenario of 2D wave-equation
migration from topography, I present appropriate boundary conditions,
detail a method for obtaining potential function solutions, and
outline a ray-tracing approach. These three components collectively
define and algorithm for computing a geometric coordinate system.