... } of points in 3D spacex1 , x2minimum and maximum of x-coordinates of points XYZy1 , y2minimum and maximum of y-coordinates of points XYZz1 , z2minimum and maximum of z-coordinates of ... step of the grid in the y-directionNB matrix of the nearest pointsK matrix of distancesKmax maximal element of the matrix K3D three-dimensional RS resolution of mapFilter parameter of the ... functionD planar domain of ),( yxf)(hγvariogram functionP matrix representing grid valuesi1 , j1size of the grid = number of columns and rows of the matrix PDx step of the grid in the x-directionDy...