Spectra Precision Survey Pro v4.5 Recon and Nomad Reference Manual - Manual (Page 226)

Survey Pro Reference Manual
R-218
is rotated by the azimuth angle of the central meridian of the
projection so that grid North lines up with geodetic north at the
origin.
Key In Zone - Ellipse
The Key In Zone Ellipse screen is used to set or create an ellipse for a
new datum. This screen is only displayed when Datum Type is
Molodensky
or Similarity.
Choose an ellipse for the new zone.
Ellipse from Data Base: Choose this option to use the
selected data base ellipsoid.
Key in
Ellipse: Choose this option to enter the values for
the custom ellipsoid.
Values : is where you enter the values for the custom
ellipse if you are not using Ellipse from List:
Ellipse a : is where you enter the semi major axis of the
new ellipsoid.
Other Parameter : is where you select the other ellipse
parameter to enter. You can use one of: Semi minor axis;
Flattening; Reciprocal flattening; First eccentricity; First
eccentricity squared; Second eccentricity; Second
eccentricity squared.