Never mind. I figured it out.
The HTML is just like calling any ISMAP but with a .cgi call instead of a .map call:
<A HREF="/cgi-bin/clickmap.cgi"><IMG SRC="/worldmap.jpg" ISMAP></A>
And the script that deals with it is:
#!/usr/local/bin/perl
print "Content-Type: text/html\n\n";
print "<HEAD><TITLE>Clickmap Example Page</TITLE></HEAD>\n";
print "<BODY>\n";
($clicked_x, $clicked_y) = split(/,/,$ENV{QUERY_STRING});
print "x=", $clicked_x, " y =", $clicked_y, "<BR>\n";
I was using the wrong environmental variable before. Of course, the above snippet is just the start. X and Y will be converted to latitude and longitude and the other info will be included in the script to make the necessary calculations.
Rick Wiegmann Koshko