It becomes much easier to generate an accurate relief map with help of updated PreAgri algorithm. After downloading field work data or points from the GPS receiver, the system allows to make the relief map by fields and collect a common map for the whole land bank of the farm. By default, PreAgri builds horizontals with an interval of 0.5 meters, later users will be able to adjust this value. The contour lines are automatically cropped by the border of the field. The thickness of the lines and the color depends on the height (multiples of 1, 5, 10, ... meters). In the presence of coordinates in the RTK signal mode, we obtain an exact terrain relief, which can be taken into account when making VRA maps and watering.