We have added displaying of land bank with the numbering of fields and the ability to display information about the selected field on the map of precision farming http://preagri.com/map/. For selected field was added the window with one, two or four maps in a window. The window with maps contains the ability to select of any layer containing the number of the field to analyze the data for a different layers and for any time period. This algorithm allows to compare layers: soil sampling, seeding, fertilization, vegetation indices, relief, yields and other data.