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State Grid Factor program

Discussion in 'Surveying & Geomatics' started by djames, Oct 22, 2013.

  1. djames

    djames 5-Year Member

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    Anyone know of a stand alone program that will compute state combine grid factor using Geoid 12A ? for a given point or site average .
     
  2. John Putnam

    John Putnam 5-Year Member

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    I would say CORPSCON but I'm not sure that it uses Geoid12A yet. I don't think this is a real problem though. The geoid model is used in the computation of the sea-level correction and I don't think a couple of cm difference in the model is going to add any significant error. We are talking about changes in the 9th decimal place which translates to a change of about .1 millimeter, definitely not a problem if you are using a combined factor.
     
  3. Mark Mayer

    Mark Mayer 6-Year Member

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    > I would say CORPSCON but I'm not sure that it uses Geoid12A yet.
    These instructions for loading Geoid09 can be easily adapted to load Geoid12a.
     
  4. djames

    djames 5-Year Member

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    Current download says combine scale is wrong dont use.
     

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