• This guide will allow you to perform the basic functions of viewing and editing the files associated with the AgNav system. Be sure to refer to the AgNav GPS Guidance System Quick Start Manual for additional information. For references to longitude/latitude formats, see Guide for Converting Lat/Long Coordinates.

Viewing Block & Flight Files:

1. Start NAVVIEW software:
   Change to the directory where flight data files are located (Example: CD \FLIGHTS). Start the Navview program by giving the full path to the program: \AGNAV\NAVVIEW .
2. Select an area file:
   Navigate through the listing with <F1> (down) and <F2> (up). Select area to display by pressing <Enter>.
3. Select flights to replay:
   The next screen prompts you for "QUICK PARAMETER SETUP? Y/N" Press <Enter> for "Yes". After viewing the parameter setting, press <Enter>. Press <Enter> to select "SPRAY DATA FILE" as the source. Either press <Enter> to select "DISPLAY ALL" or press <F6> to deselect "DISPLAY ALL". Move through the list with < F1> or <F2> and tag (select) with <F6>the flight file(s) of interest. When your selection is complete, press <Enter>. If the files selected form a continuous flight path press <F1> to select "Yes". Press <Enter>.
4. Printing the flight:
   Next, you will be asked to choose your printing options. Choose "NO PRINT" to skip the printing process or select one of the print options for output. If you choose a printer, you will need to select "Portrait" or "Landscape" page orientation. Press <Enter> to accept orientation. Selecting "TO FILE" will create a file "AGNAV.PRN," which can be printed later. Select "TO PRINTER" to setup NAVVIEW to print when <ALT-P> is pressed.
5. Drawing the treatment area:
   After selecting your print options, the screen will show a graphic of the treatment block and flight statistics. Switch between "NORMAL REPLAY" and "QUICK REPLAY " by toggling <Alt-F8>. (NORMAL REPLAY displays flight progress and can be paused to examine the flight in progress; QUICK REPLAY draws the treatment block and flight line quickly with little opportunity to get any flight information.)
6. Controlling the replay:

   Normal Replay			Quick Replay
   Up-arrow	Increase replay speed		<F1>	Zoom in
   Down-arrow	Decrease replay speed		<F2>	Zoom out
   Left-arrow	Pause and backup flight on area/aircraft		<F3>	Toggles b/t center
   Ctrl-left-arrow	Toggles the replay counter between 1, 10, 100 steps		<Alt-F8>	Toggle between Quick and Normal Replay
   Right-arrow	Step flight one record at a time
   <Enter>	Toggles pause/replay
   <F1>	Zoom in
   <F2>	Zoom out
   <F3>	Toggles between center on area/aircraft
   <F4>	Clear the display and restart the replay
   <F5>	Clear the display and restart from the last flight
   <F6>	Clear the display and restart from the next flight
   <Alt-P>	Print or capture the current screen
   <Alt-F4>	Toggles spray and flight path/spray only/flight path only
   <Alt-F5>	Toggle between thick/thin crosshatching
   <Alt-F6>	Toggle draw/don't draw grid
   <Alt-F7>	Display data inside spray area only
   <Alt-F8>	Toggle between Quick Replay and Normal Replay
   <F10>	Menu of keyboard controls
   <Ctrl-F1>	Exit Replay

Editing Block Coordinates:

Although you can use the NAVVIEW to edit the block coordinates, it is easier and faster to edit the file manually with a text editor. See "Editing .NO1 files manually" below.

1. Start NAVVIEW software:
   Change to the directory where flight data files are located (Example: CD \FLIGHTS). Start the Navview program by giving the full path to the program: \AGNAV\NAVVIEW .
2. Select an area file:
   Navigate through the listing with <F1> (down) and <F2> (up). Select area to display by pressing <Enter>.
3. Select a block to edit:
   The next screen prompts you for "QUICK PARAMETER SETUP? Y/N" Press <Enter> for "Yes". Press <F5> to create a new block. Press <Enter> to the question "Do you have a keyboard?". Edit the suggested filename; maximum characters is 8. To be consistent with the other files, make the extension ".NO1". The program will look for the file and ask if you want to create a new file if it cannot find it. Press <Enter>. Edit the parameters, if needed. Press <F4> to go to the next screen. Enter the coordinates for the first corner of the treatment block. The format must be degrees, minutes, decimal minutes (DM.s). Type the latitude degrees, followed by a space, then the minutes. Seconds must be converted to decimal minutes. (See Guide for Converting Lat/Long Coordinates for help in converting to DM.m.) Press <Enter> and then type the longitude degrees, followed by a space, then the minutes. Press <F1> when finished entering treatment block corners. Use <F1> to select "Yes" to the prompt "Exit editor?". Press <Enter>. Press <Enter> again to accept "Yes" to "Save file?". You will be returned to the Main Menu.
4. Displaying changes:
   To display the treatment block, use <F1> to move the just-created or modified block. Press <Enter> to accept. The next screen prompts you for "QUICK PARAMETER SETUP? Y/N" Press <Enter> for "Yes". After viewing the parameter setting, press <Enter>. Press <F1> to select "REMOTE", Press <Enter> to display the block.

Editing .NO1 Files Manually:

1. Use a text editor to edit the .NO1 file contents:
   Use MS-DOS EDIT, EDLIN or MS-Windows NOTEPAD to edit a .NO1 file. Using a word processor (e.g. MS-Word or WordPerfect) can add formatting information that renders the file unusable.
2. File contents:
   Each line in the .NO1 file has a record type indicated by the first field. The record type for the block corner is "2". The fields for type 2 are: type, latitude, longitude, label ("AREA CORNER"), corner number.
3. Changing the corner coordinates:
   The format for the latitude and longitude coordinate is degrees, decimal- degrees (D.d). The longitude value needs to be preceded by a "-" (minus sign). See Guide for Converting Lat/Long Coordinates for help in converting from degrees, minutes, seconds (DMS) to degrees,decimal-degrees.