SUMMARY usa

usa.st is a simple graphics application that displays a scrolling map  
of the 50 United States along with a scrolling list of their names.  
The user can click directly on a state to highlight it or can choose  
from the list of names. It is obviously very simple but with a little  
imagination it can be turned into something more sophisticated.

It requires an ASCII data file usa.data to be read in. This  
file defines the boundaries of the 50 states as polygons. See the  
State class method called readStates to make sure the filename is  
correct.

I got the outlines for the states from a public domain MacDraw file.  
When printing a MacDraw file you can choose to print it to a file.  
This saves it as a PostScript file. I then edited the file to extract  
the polygons and manually entered each name. I then read the file in  
Smalltalk to create Smalltalk objects (flipping the x and y  
coordinates). To make a long story short, the polygons are now  
available as Smalltalk objects.

					Enjoy!!

					Dan Benson  (June 30th, 1992)

current address:

Dept. of Elec. Engr.
Univ. of Washington
Seattle, WA 98195
benson@ee.washington.edu

address as of 7/6/92:

Siemens Corportate Research
755 College Road East
Princeton, NJ 08540
benson@siemens.siemens.com