Spectra Precision Survey Pro v3.80 Recon iPAQ User Manual - Manual (Page 122)

User’s Manual
114
Select any Break-lines (optional)
Break-lines are used to define any linear surface that has an abrupt
elevation change, such as a trench, or the face of a cliff. Break-lines
are necessary for an accurate TIN to be created for these surfaces.
Polylines or alignments are used to define any number of break-lines,
but if a boundary is used, the entire break-line must fall inside the
boundary – if any part of a break-line touches the boundary, the
break-line is invalid.
9. To select a break-line, tap the %UHDNOLQHV« button to
open the Add/Edit Break-lines screen. If any break-
lines have already been selected, they will be listed
in this screen.
a. To add an existing break-line, tap the
$GG
([LVWLQJ« button. This will display all the
polylines in the current job. Select the desired
polyline and tap OK. This will move the selected
polyline to the DTM layer.
b. When finished adding break-lines, tap &ORVH to
return to the Setup DTM 3D screen.
10. When you return to the Setup DTM 3D screen, the
3RLQWV« button will open the Points on DTM Layer
screen where the points on the DTM layer can be viewed, new
points can be imported, and existing points can be deleted (moved
to the Auxiliary layer). The
' 9LHZ« button will open the 3D
View screen where the DTM surface for the points on the DTM
layer can be viewed from any angle.
11. This completes the Stake DTM set up procedure. Tap &ORVH
from the Setup DTM 3D screen to return to the Stake DTM
screen.