Fecha de publicación: 22/02/2007 Fuente: Wipo "precision farming" A method is provided for updating a legend of a spatial display for use with graphical user interface of a field computer linked to one or more sensors for sensing data or information from a piece of equipment performing an agricultural operation. The method provides a field computer with a graphical user interface, at least one sensor operatively linked to the field computer, and a piece of equipment performing an agricultural operation and in operative communication with the at least one sensor for sensing data or information for display on the graphical user interface. The method comprises the steps of assigning one or more range values to a legend wherein said range values divide substantially all of the data or information into a plurality of associated ranges; displaying a spatial representation of a geographic location wherein said display is coded to associate the range values with corresponding locations on the spatial representation of a geographic location; and updating the legend based upon a predefined criteria.