When the user begins a GIS project, many commands and parameters need to be initialised or defined.    
These range from parameters controlling the screen viewing characteristics to commands that determine the resolution at which operations such as feature editing or generation are interactively or automatically performed. Most of these settings can be registered in some script files; hence the user can consistently start all the subsequent sessions of the work. The user with limited experience should carefully verify the input data spatial resolution. Parameters controlling resolution (i.e. tolerance, weed, rasterisation cell-size, etc.) of data acquisition and editing must be in agreement with the characteristics of the input data and the final objectives of the project.