From: address@is.invalid   
      
   Ammammata,   
      
   > i pasted your post into chatgpt, it says:   
   >   
   > You're very close - the issue is a combo of log base,   
      
   Yeah, I noticed that too.  log() != log()  : loge(), log10(), ln(), lg().   
      
   > formula form,   
      
   You got me there I'm afraid. No idea what thats supposed to be about.   
      
   > and how Mercator Y is mapped to pixels.   
      
   Really ?  I can't imagine.   
      
   > Nothing fundamentally wrong   
   > with your trig. Let's untangle it cleanly.   
   >   
   > then it explains a possible error in your formula and suggests   
   > the workaround   
      
   Can you post what it said about that explanation and work-around please.   
      
   Regards,   
   Rudy Wieser   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)