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scale factor calculation

how can i calculate scale factor in this following case

gps length is 103.453m(wgs84)

but true length is 103.395(by total station)

pls help me

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  • GEO Ambassador

    Jim's looks good!  here is a scale factor calculation tool I found as well that may help in the future  http://webpages.charter.net/sinkwich/sdventure/html/sd_scalecalc2.htm

    • thanks for ur link

  • GPS to True = 103.395 / 103.453 = 0.99943936
    GPS distance x 0.99943936 = True distance

    Is this what you needed?
    • Land Surveyor

      Dear Jim,

      I have a relevant question.

      I have a list of GPS control points. and I am trying to make a traverse using Toral station.

      but each one of the points has a different scale factor.

      isn't the scale factor suppose to be calculated from the distance between two points as in the question above?

      in this case, should I measure the distance from the site and calculate a new scale factor or use one of the scale factors which is on the list or calculate an average of them?

      Thanks in advance

    • thank you Jim

      this used a temporary benchmark

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