I have seen many articles here at CodeProject about coordinates and GPS signal handling, like \"Writing your own GPS Applications\" and \"Distance between locations using latitude and longitude\" among others. Most of them do some tasks around a lati

In the GIS/GPS world, we represent a position on Earth with three variables XYZ (for Earth centered coordinates) or latitude (phi) , longitude (lambda) and height (h) in polar (PLH) representation. Three-D graphic applications also requires processin