Choose a centerline – Spectra Precision Survey Pro v4.9 User Manual
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Warning: If importing a DXF or DTM file where the distance units in the source file are different than the distance
units for the current job, the imported coordinates will be converted to the current job’s distance units when they are
imported. This is normally the desired result, but it can cause a problem if the distance units for the imported data or
the current job were set incorrectly. This situation can most commonly occur when working with International Feet
and US Survey Feet, where the conversion from one to the other is not always obvious.
Usually the difference between International Feet and US Survey Feet is negligible (2 parts per million), but when
dealing with State Plane or UTM mapping plane coordinates, which are often very large in magnitude, the difference
can be considerable if the coordinates are converted from one format to the other.
If importing coordinates from a source where you are not sure if the units are in International Feet or US Survey Feet
into a job that is set to International Feet or US Survey Feet, you will usually just want to import them without any
conversion being performed. To do this, be sure to select the same distance units for the source file as those set for the
current job.
Store Point: is the starting point number if points are stored during the staking process. Future points are stored with
the next available point names.
HR: is the rod height.
: opens the
With Centerline: When checked, offset and stationing information from the selected centerline to the stake point is
also provided in the DTM Shot screen.
[Choose a Centerline…]: will open the
screen where an existing polyline or alignment can be selected
that describes a centerline.
Generate DTM with Staked Points: will add any staked points to the non-reference DTM layer and generate a DTM
surface for all the objects on this layer. This DTM surface will be updated when a new point is stored to it. You can
also view this surface with live cut/fill volumes at anytime from the 3D View screen.
Note: Viewing the DTM during DTM Stakeout is a useful quality assurance technique to determine where additional
points are needed.
[Setup / View DTM]: opens the Setup DTM 3D screen where the non-reference DTM layers are configured and
optionally viewed from the 3D View screen.
[Backsight…]: opens the
Choose a Centerline
[Stakeout] [Stake DTM] [Choose a Centerline…]
The Select Line screen is used to select a particular polyline or alignment that defines a centerline. Separate overhead
and side views are displayed for the selected polyline.
Simply select the desired line and tap
.
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