Spectra-precision Survey Pro v4.5 Ranger Reference Manual Manuel d'utilisateur Page 231

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Survey Menu – GPS Module
R-223
Center of Projection
Rectify Coordinates: is where you set if the coordinates are rectified.
Coordinates are ‘rectified’ if the local plane 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.
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