Spectra Precision Survey Pro CE v3.80 Ranger GPS Reference Manual - Manual (Page 42)

GPS Reference Manual
42
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.
Projection Key In Setup - Datum Translations
Choose an ellipse for the new zone.
•
Ellipse from List : choose this option to use the selected data base
ellipsoid.
•
Ellipse Values : choose this option to enter the values for the
custom ellipsoid.