Spectra Precision Survey Pro 3.80 Recon GPS Reference Manual - Manual (Page 45)

Survey Menu – RTK
45
Projection Key In Setup - Oblique Mercator
This page is only displayed when the Zone type is set to Oblique
Mercator Angle .
Azimuth At : is where you enter the convention for
projection azimuth. Your choices are:
•
Equator
•
Center of Projection
Origin At : is where you enter the convention for
projection azimuth.
•
Equator
•
Center of Projection
Projection Key In Setup - Ellipse
The following 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 Parm : 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.