Spectra Precision Survey Pro v4.2 GPS - Manual (Page 12)

10
Collecting Control
Tap Collect Control> to launch the GPS Control Collection
screen. Choose existing points from your job to use as GPS
control points, and occupy those points with the rover
receiver.
You need a minimum of two horizontal control points to solve
a Ground – TDS Localization mode horizontal adjustment. You
need a minimum of one horizontal control point to solve a
Mapping Plane
mode horizontal adjustment. You need a
minimum of one vertical control points to solve a vertical
adjustment using a geoid model. You need a minimum of
three control points to solve a vertical adjustment without a
geoid model.
Once you have the minimum required number of points, you
will see a prompt. You can solve the adjustment at that time,
or you can choose to collect more control, and then tap
Projection to solve the adjustment later.
Solve Localization
Once you have collected the required number of horizontal
and vertical control, you can solve the localization
adjustment. Tap Solve Localization… to open the Solve
Localization wizard where you can pick from the available
control points to calculate the coordinate system adjustment.
Once you have solved the adjustment you are ready to start
data collection or stake out.
Start Now
When a localization is required, but you do not have the
necessary control information in the field, or if you want to
begin collecting data and you wish to occupy the required
control later in the survey, you can also tap Start Now> to
begin surveying right away. In this case, you start surveying
with a temporary localization to get you close to local
coordinates. You may then solve the localization at any time
during the survey field work, or even after the field work is
finished, and all GPS collected points will be updated to the
proper local coordinate.