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convert_gps_gausskrueger2wgs84_sub ( Latitude ; CartOutputXMeters ; CartOutputYMeters ; CartOutputZMeters )

Recursive subclass to convert_gps_gausskrueger2wgs84 and cannot be used on ist own

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Rewolfer - Show more from this author http://rewolfer.de

  Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

Let ( [ LatitudeIt = Latitude; eeWGS84 = ,0066943799; aWGS84 = 6378137; n = 1 - eeWGS84 * Sin(Latitude) * Sin(Latitude); n = Sqrt(n); n = aWGS84 / n; Latitude = CartOutputXMeters * CartOutputXMeters + CartOutputYMeters * CartOutputYMeters; Latitude = Sqrt(Latitude); Latitude = (CartOutputZMeters + eeWGS84 * n * Sin(LatitudeIt)) / Latitude; Latitude = Atan(Latitude) ]; Case( Abs(Latitude - LatitudeIt) ≥ ,000000000000001; convert_gps_gausskrueger2wgs84_sub( Latitude; CartOutputXMeters; CartOutputYMeters; CartOutputZMeters); Latitude ) ) Click to copy

This is a recursive subclass to convert_gps_gausskrueger2wgs84 (listed here as well) and cannot be used on its own!
It computes a mysterious »7-parameter-Helmert transformation« to correct the coordinate sent by O2Germany.

 

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