Replies

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  Arnel M. Domag August 26, 2011 at 10:51pm

  If what you are trying to achieve here is coordinates transformation from local to grid then that would definitely be much more complicated as the process requires to transform first the local coordinate values into its geocentric counterparts before finally hitting the grid values.
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  Arnel M. Domag August 26, 2011 at 10:42pm

  Please note that the Length of Meridian Arc, S is unfortunately an elliptical integral and has no closed form solution. It simply means that it is not directly integrable. You need to discretize this function using power series expansion method (ie. McLaurin technique) in order to arrive at linearly dependent directly integrable chunks of functions. Cheers and Good Luck!
  
  Arnel M. Domag said:

  Please check this equation used to convert geographic/geodetic coordinates into grid using Transverse Mercator map projection technique. Hope this helps.

   

  
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  Arnel M. Domag August 26, 2011 at 10:29pm

  Please check this equation used to convert geographic/geodetic coordinates into grid using Transverse Mercator map projection technique. Hope this helps.

   

  
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  Arnel M. Domag August 26, 2011 at 9:25pm

  Please search the net for Map Projection Manual by Snyder.
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  Arnel M. Domag August 26, 2011 at 9:08pm

  Is it for Transverse Mercator projection?
• Land Surveyor

  Scott D. Warner, PLS August 26, 2011 at 8:03pm

       Omar, thank you for a very good question.  One that I can not answer, as I am not a geodesist, but a land surveyor.  All of the math behind the conversion is like a mystery inside of a mystery to me, but here is another conversion tool that I found:  UTM & Lat-Lon Conversions  

       I wonder if LSU should have a group for experts in geodesy to help guide members on subjects like this.  I know that most land surveyors are not geodesists, and I suspect that most geodesists are not land surveyors.  However, the two professions are interrelated and really a part of the same ultimate reality that we as professionals in the geo-sciences family reside. 
• Survey Legend

  ⚡Survenator⌁ August 26, 2011 at 12:35pm

  here is a helpful discussion thread about the conversions on the Esri Forum:

  http://forums.esri.com/Thread.asp?c=64&f=786&t=188996

   

  and a couple of helpful coordinates related documents here:  

   

  let me know if this helps Omar