In the View area of the variable rate map management, the user has access to Shapefile files of variable rates map loaded into the IsoView internal memory.
When selecting the item in the Variable Rate Maps menu and pressing the confirm button 
, the List of files screen will be displayed, as shown in the following image, in this screen the user must select the variable rate map that contains the information to be displayed.
Shapefile files of variable rate maps are shown in a table and are organized in the internal memory with the same folder structure from the flash drive. The user can browse the internal memory folders in order to find the wanted SHP file. When selecting the desired file, the distance from the current GNSS coordinates to the map area will be displayed at the bottom of the screen.
Pressing the preview button 
, the parameters screen of the input map is presented as in the image below, through which the user must select the information contained in the file with extension “.DBF” that will be used to generate the polygon map.
When pressing the forward button 
, the Loading screen with the text “Loading file” will be displayed while the file is uploaded from the internal memory so that the variable rate map is displayed on the screen. After loading, the map appears on the screen as shown in the following image.
Variable rate map display screen contains a legend that indicates the map colors for each range of the chosen parameter. On this screen, pressing the back button 
returns to the previous screen.
Also in the View area, the user can delete a variable rate map file using the delete button 
. When pressing it, a screen containing an information board with red background will be displayed, informing the names of the 3 files (SHP, DBF, SHX) that composes the variable rate map.
If the user presses the cancel button 
, the deletion will not be performed and the system will return to the previous screen. If the confirm button is pressed , the variable rate map file will be deleted from the internal memory and the confirmation will be presented, as shown in the following image.
