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Table Of Contents
Working with a Stratum
7
5 Enter an elevation for the second point.
The following prompt is displayed:
Desired Slope (or Grade) <Infinite>:
6 Define the slope or grade at which the points are placed:
n
Type a slope in the format specified.
n
Type G and a positive or negative grade percentage.
7 Select the points to adjust.
8 Press ENTER to complete the selection set.
The command adjusts the elevations of the points to match the specified slope
or grade. For example, if you selected points that were originally placed at
grades of 2.0% and 2.5%, and you defined an absolute hinge grade of 3%, then
all the points are now placed at a grade of 3%.
The following illustration shows point elevations adjusted by an absolute hinge:
Modify by absolute hinge
Working with a Stratum
You can use the Modify Point Elevations
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Select Current Stratum command
on the Grading menu to define a stratum based on the existing and finished
ground surfaces for calculating volumes. You can also delete a stratum using
this command. In all cases, the first surface is considered your existing ground
and the second surface is considered your finished ground for volume and
elevation comparisons.
Definition of a Stratum
A stratum defines a group of two surfaces for the purpose of calculating volumes
and elevation differences between those two surfaces. In all cases, the first
surface is considered the existing ground and the second surface is considered
your finished ground for volume and elevation comparisons.
You can also define multiple strata with various types of combinations. For
instance, you can establish an existing ground surface, and then create one or
more finished ground surfaces to compare with that existing ground surface.
You can then define different strata by combining the single existing ground
surface and different finished ground surfaces.