2011

Data Type
Specify whether the overlay compares feature classes or Display Manager
layers. Both the source and overlay must be the same type (you cannot
compare a feature class to a layer).
Source/Overlay
If you select Layers as the Data Type, select the Source Layer and Overlay
Layer. These layers are the output of preceding Add Feature Layer activities.
If you select Feature Classes as the Data Type select a Source Feature Class
ID (the output of a preceding activity). Then select the Source Feature Source
for that feature class (if it is not selected automatically). Do the same for
the Overlay Feature Class.
Output File
Enter a location and file name for the output (overlay) SDF file. Click
to
navigate to a location.
Overlay Type
Select the type of comparison to do. For a complete description of these
options, see Overlaying Two Feature Sources (page 1309).
Optional Parameters
■ Display Name: Enter a title for this activity.
■ Sliver Tolerance: Specify when small polygons resulting from the overlay
operation become separate features and when they are added to larger
polygons.
■ Units: Select the units used in determining the sliver Minimum and
Maximum settings. The coordinate system determines the available
choices for the source layer. If the sliver roundness is higher than
the Maximum value, it becomes a separate polygon in the output.
If the sliver roundness is lower than the Minimum value, it merges
with its neighbor polygon in the output. To see reasonable values
for the selected data set, click Suggest. To ignore slivers, click Don’t
Remove Slivers.
■ Ordinate Tolerance: Specify when two nodes or vertices of a line or
polygon are treated as separate points.
■ Units: Select the units used in determining the Length setting. The
coordinate system determiens the available choices for the source
layer.
2042 | Chapter 40 Workflow Designer