Spectra Precision Survey Pro v4.6 Recon and Nomad User Manual - Manual (Page 261)

GPS Coordinates
251
Mapping Plane Select Zone
Use the Select Coordinate System screen to select either a mapping
plane zone or a localized site from the coordinate system database
file. This screen is also used to open the Key In Zone wizard where
you can key in the parameters of a custom map projection and datum.
1. Open the Select Coordinate System screen. This
may be done automatically by the Start GPS
Survey wizard, or when you tap Select Zone… on
the Horizontal card of the Projection screen when
in mapping plane mode.
2. Select the type of database record you wish to
choose in the Data Base box. To pick a map
projection zone from the database, tap Select
Database Zone
. To pick a localized map projection
site from the database, tap Select Database Site.
3. If you are picking a map projection zone, select
the Zone Group from the drop down list.
4. Select the Zone or Site from the drop down list.
5. If you have selected a zone with a datum, the
datum name will be displayed. If you have selected a zone
without an attached datum, such as the database UTM zones,
you must select a Datum from the drop down list.
6. If there is a default geoid attached to the zone or site, Use
Geoid
is checked and the geoid model is selected in the drop
down list. You can choose to use this geoid, or you can change
the geoid model used by this zone or site.
7. Tap Finish to set the selected zone or site and the selected
geoid (if Use Geoid is checked) as the current coordinate
system.
Note: If you change the geoid model used by a site record, and if that
site record has a vertical adjustment solved, then you will be
prompted that the vertical adjustment parameters will be cleared.