Installation Instructions for Winkel Plot

System Requirements
     Winkel Plot was compiled using Microsoft's Visual Basic version 6.0.  The 
program requires Windows 95 or later to run.  NT users are also able to try out 
WinkelPlot.  For optimal results, the screen resolution should be set at 800 x 
600.  The executable file requires 48 K of disk space. 

Installation Process
     Once you have un-archived WinkelPlot and placed the three files 
(WinkelTripel.CAB, setup.lst, and setup.exe) into an appropriate folder, go into 
that folder and double click on the setup icon - this will begin the setup of 
Winkel Plot.  There will be several windows that will ask you information (e.g., 
select the appropriate directory into which the Winkel Plot software will be 
placed).  Once the installation program is complete, you should see a window 
saying: Winkel Plot Setup was completed successfully.  

Winkel Plot Program Operation
     Upon successful installation, clicking starts the program on the Winkel 
Triple.exe file in the directory in which it was installed, or going through the 
Windows Start button.  Once the program begins, you will notice that the screen 
is blank.  

     The first step is to open a coastline file.  Under the Program option along 
the main menu of Winkel Plot, select the Open Coastline File option.  This 
action produces a dialogue box that allows the user to select the coastline 
file, Wrldcost.txt, which is shipped with the Winkel Plot program and should 
automatically be placed into the same directory as the executable.  Wrldcost.txt 
is the coastline file from World Data Bank 0 and includes approximately 8000 
pairs of latitude and longitude values expressed as radians in chains of no more 
than 100 pairs at a time.  Selecting this file produces a message box indicating 
that the selected file was successfully opened.  The user should then select the 
option Show Options under the Program option on the main menu.  This action 
produces the form that will display the Winkel Triple.  

Winkel Plot offers three options for displaying the Winkel Tripel projection: 

1) Select the location of the central meridian
2) Specify spacing for the parallels and meridians
3) Choose either to display or hide the parallels and meridians

The user can select the following default values:

1) Central Meridian: 0.0 degrees
2) Parallel Spacing 10.0 degrees
3) Display the parallels and meridian: Yes

To display the Winkel Triple with these default values, the user should press 
the Plot button on the form. The Winkel Tripel projection will appear in the 
picture box centered at 0.0 longitude with a spacing of ten degrees for the 
parallels and meridians.  

     The user also has options to change the default values and specify a new 
central meridian, change the spacing of the parallels and meridians, and select 
whether to display parallels and meridians (as opposed to a bounding frame).  
For instance, by entering a value between -180.0 and +180.0 in the central 
meridian text box, the user can specify the location of the central meridian. 
Changing the central meridian allows the user to alter the center of the 
projection.  The spacing of the parallels and meridians can also be changed from 
the default of ten degrees.  Entering a value between 5.0 and 180.0 degrees, the 
user can alter the interval at which the parallels and meridians are drawn.  The 
option to not have the parallels and meridians displayed is also available, 
although by default, the parallels and meridians are displayed.  If the option 
is deselected (i.e., the check removed), only a boarder is drawn around the 
projection.

If you have difficulties with the program or would like to suggest ideas please 
contact the author at the following address:

Fritz C. Kessler

Department of Geography
Frostburg State University
Frostburg MD 21532
Voice: (301) 687-4266
e-mail fkessler@frostburg.edu