XPost: alt.windows7.general, alt.comp.os.windows-10   
   From: nospam@needed.invalid   
      
   On Sat, 1/24/2026 3:42 AM, R.Wieser wrote:   
   > Paul,   
   >   
   >> I wrote a program, worked an example and put a dot on a map   
   >> in a posted picture. That's enough.   
   >   
   > I already knew that both of those formules where expected to work, so you   
   > wasted your time in proving that your CoPilot provided one does.   
   >   
   > *What I was asking for* was a bit of help to why my implementation of first   
   > one, than both formules refused to return a usable result.   I gave you   
   > *everything* to be able to do so.   
   >   
   > You think that what you did was enough ?   How ?  You did not even *try* to   
   > answer my question. :-(   
   >   
   > Regards,   
   > Rudy Wieser   
   >   
   >   
      
   Show me current code.   
      
   Have the program print out something like this.   
      
   Enter Latitude in degrees: -80    Y=0.887741   
   Enter Latitude in degrees: -50    Y=0.660855   
   Enter Latitude in degrees: -30    Y=0.587425   
   Enter Latitude in degrees:   0    Y=0.500000   
   Enter Latitude in degrees:  30    Y=0.412575 \___ 39 degrees is between these   
   two   
   Enter Latitude in degrees:  50    Y=0.339145 /   
   Enter Latitude in degrees:  80    Y=0.112259   
      
   You can see from the output, I'm covering most of a unit square   
   and my output graph origin must be in one of the   
   corners of the unit square.   
      
   We know the equation is not valid past 85 degrees   
   at either end, so that range of values will   
   tell us whether we are covering a unit square or not.   
      
   Most of the trouble with this stuff, seems to be   
   with origin-of-map and origin-of-unit-square.   
      
   If we enter (0,0) for lat-long we expect to be in the middle   
   of the unit square. You can see my Y above is 0.5 in that case.   
      
   You can check in Wikipedia for the icon next to the   
   lat-long for a city, and that icon (with a good browser)   
   will yield a pop-up map with enough detail you can   
   fit it to your map data.   
      
      Paul   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)