Spectra Precision Survey Pro v4.6 Recon and Nomad User Manual - Manual (Page 122)

User’s Manual – Conventional Mode
112
Select Your Layers
7. Tap Layers… from the Setup DTM 3D screen to open the Layers
(Stake DTM) screen.
a. Select the layer that you want to use for the
stake points and other objects that exist on the
surface you are staking. These points will be
used to generate a DTM surface to compare to
the reference DTM surface.
b. Check the Select Auxiliary Layer checkbox to
automatically store any points or break lines to
the layer selected from the corresponding
dropdown list that cannot be used for DTM
generation. Examples of invalid objects would
include a polyline that extends outside a
boundary, or a point with identical coordinates to
another point, but with a different elevation.
Leaving this box unchecked will result in a
prompt to select a layer prior to storing an
invalid object.
c. Tap when finished to return to the Setup DTM 3D screen.
Select a Boundary (optional)
You can optionally define a boundary using a closed polyline for the
points that are staked, which will limit the computation of the DTM
surface within the selected boundary.
A valid polyline must be closed, and the line must not cross over
itself, such as in a figure-eight.
8. To select a boundary, tap the Boundary… button, which will
open the Choose Polyline screen.