I am using Kriging for the first time in the analysis of Martian Topography, and previously I have used IDW with success. I am using approximately 5 million points and I appreciate the predictive, iterative nature of this method but it is taking much longer than I would expect ( 6 hours +). I have looked the session progress and I see the Geographical transformations to be NAD and some of its variants, I would have expected the Martian Coordinate System equivalent to the data frame to be here. The points are GCS_Mars_2000_Sphere and the Projected Coordinate System Mars 2000_Equidistant cylindrical. Could this disparity be the cause of the excessive execution time?