Spectra Precision Survey Pro v4.6 Ranger User Manual - Manual (Page 259)

GPS Module
249
Choose to Use Ground – TDS Localization when
your survey is a ground level site with no
projection and no datum to relate the local
coordinates to geodetic. When you choose
Ground – TDS Localization
, the next step will be
base and rover setup, and solving the
localization adjustment.
Choose to Select a Mapping Plane Zone when
your survey coordinate system is a conformal
mapping plane defined in the coordinate
system database. When you choose Mapping
Plane
mode, your next step will be to select a coordinate system from
the database (Page 228). Then, you will proceed with base and rover
setup. If you set the base on a known point, you do not need a
localization adjustment and you will be ready to collect data after
rover setup. If you start from an autonomous base, you must solve a
localization adjustment.
Start GPS Survey – Choose Geoid
Use the Select Geoid Model screen to select a
geoid model and data file to use with either the
Ground - TDS Localization
or Mapping Plane
zone. This screen only appears as part of the
GPS Start Survey wizard when a geoid is not
currently assigned.
1. Select a Geoid Model to use from the list.
2. If there are no data files for the selected
geoid model, the File control will display
"No .ggf files for this geoid." If there is only
one data file for the selected geoid, the File
control will display that .GGF file name. If there are multiple
data files for the selected geoid, select the geoid you wish to use
from the list. When there is a geoid file displayed, the File Name
control displays the data file name from the .GGF file header.
• Tap Accept to set the geoid for the current projection record
and/or change the data file used by the current geoid model.