XPost: alt.windows7.general, alt.comp.os.windows-10   
   From: G6JPG@255soft.uk   
      
   On 2026/1/17 7:19:55, R.Wieser wrote:   
   > John,   
   >   
   >>> Did you _try_ using just the tangent on a couple of places?   
   > ...   
   >> I have to do some more experiments.   
   >   
   > After having done so, it looks like that   
   >   
   > tan(DegToRad(Latitude)*0.78)\2.53627   
   >   
   > gives a nice result.   
      
   Asssuming DegToRad() just means multiply by pi / 180 ...   
      
   []   
      
   > By the way, 0.78 is rather close to Pi/4 .  Somehow that raises my suspicion   
   > that that is the actual value to be used, and my 0.78 is caused by my "that   
   > looks good" eyeballing ...   
   >   
   > Regards,   
   > Rudy Wieser   
   >   
   >   
   ... then the above simplifies to tan(Latitude*pi*pi/720)\2.53627, and of   
   course pi*pi/720 can be given as a constant.   
      
   --   
   J. P. Gilliver. UMRA: 1960/<1985 MB++G()ALIS-Ch++(p)Ar++T+H+Sh0!:`)DNAf   
      
   "Tolerating intolerance is not a virtue." - Barry Shein   
      
   --- SoupGate-Win32 v1.05   
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