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 processing of XYZ data. Creating such applications requires keeping track of the triplets of data-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 processing of XYZ data. Creating such applications requires keeping track of the triplets of data