2.0

Outputting Data in the HEC-2 Format
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Selecting a Rating Curve
To select a rating curve
1 Click Select to display a standard File Open dialog box.
2 In the File Name box, select the rating curve file.
3 Click Open to continue. If the rating curve contains more than 20 points,
which exceeds the HEC-2 limit, the Rating Curve Output window displays,
warning you that 20 points is the HEC-2 limit and that only 20 points will be
used for the curve. Click OK to continue.
After you select a rating curve, the specified rating curve file name is listed with
the Rating Curve option.
Sampling the Cross Sections Along an Alignment
at Station Increments and Output in the HEC-2
Format
Use the HEC2-Multiple command to create multiple HEC-2 cross sections by
sampling along an alignment at station increments that you specify. You can
also specify sampling distance to the left and right of this alignment. All the
cross sections that are sampled and created are perpendicular to the defined
alignment.
NOTE
Unlike the HEC2-Single command, where you select the cross section line
you want to sample, the HEC2-Multiple command requires you to select an
alignment, along which the section lines are sampled automatically at the
station increment you specify.
NOTE
In this topic, the term 'alignment' is used to refer to a line that you draw to
define the cross sections that are created with the HEC2-Multiple
command. The term is not used in reference to alignments that you create
with the AutoCAD Land Development Desktop Alignments menu.
To sample cross sections along a defined alignment at station increments and
output them in HEC-2 format
1 From the Hydrology menu, choose HEC2 Output ä HEC2  Multiple.
NOTE
If no current surface is in use, then the Select Surface dialog box is
displayed. Select the surface on which to base the cross sections in the
Select Surface box, and then click OK to continue.
The following prompt is displayed:
First point (or Entity):
2 Do one of the following to select the alignment along which cross sections will
be sampled:
n
Select two endpoints in your drawing.
n
Type Entity to display the following prompt:
Select (Entity/POints) <Entity>: