Spectra Precision Survey Pro v4.6 Recon and Nomad User Manual - Manual (Page 267)

GPS Coordinates
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Coordinates.
3. Tap Accept to switch back to the mapping plane grid coordinate
system, and open the Adjust with Projection wizard at the Results
screen. Tap Apply to set the coordinate system and update the job
file points.
Note: If your projection is a zone based site, then the localization
parameters will automatically be converted back to the map
projection values. You do not have to resolve the localization.
4. Switching back to mapping plane grid coordinates, the
conventional Survey Scale Factor is usually set to 1.0. You will be
prompted to update the scale to the correct value to reduce EDM
measured distances to the mapping plane.
Coordinate System Database
Survey Pro uses a Coordinate System Database file (*.CSD) to store
the map projection and datum transformation parameters for many
different coordinate systems around the world. Also, horizontal and
vertical localization adjustments can be stored as site records in the
database. Below is a list of the terminology used to describe the
different records in the coordinate system database.
• Zone: Is the basic record type. A zone record specifies the
type of map projection and its parameters. Usually there is a
datum, ellipsoid, and geoid record from the database already
attached to the zone.
• Site: Is a zone record with a horizontal and/or vertical
localization adjustment added. Localizations are usually used
to correct GPS positions starting from an autonomous base.
They can be computed from control points or from manual
input of parameters. Coordinate systems with Ground
Coordinates set are also site records. A Ground Coordinates
site record may or may not have a horizontal and/or vertical
localization adjustment.
• Zone Group: Is a collection of zone and/or site records used
to keep the database organized and user selection easier.