Spectra Precision Survey Pro v4.5 Ranger Reference Manual - Manual (Page 187)

Survey Menu – GPS Module
R-179
Choose Projection Mode
The Start GPS Survey Choose Projection Mode
screen is used to select a horizontal projection
mode. This screen shows when you have not
yet solved a coordinate system for this job.
You can choose one of two projection modes,
depending on the requirements for your survey.
Use Ground – TDS Localization >: sets the
horizontal projection mode to Ground – TDS
Localization
, and opens the Choose Base Setup
screen. Use this mode when you want to do a ground level survey,
when there is no projection and no datum to relate your local
coordinate system to any geodetic coordinate system.
Select a Mapping Plane Zone >: sets the horizontal projection mode to
Mapping Plane
, and opens the Select Coordinate System screen (Page
R-209). Use this mode when you want to use a conformal map
projection selected from the coordinate system database file.
Choose Base Setup
The Start GPS Survey Choose Base Setup screen displays your three
options to configure the RTK base receiver. This screen is always
part of the wizard.
Choose Base, no base set Choose base, base already set