Use this page of the Overlay
Analysis dialog box to specify the Source and Overlay features,
as well as the type of overlay analysis to perform. Overlay results
use the split rules set in the Split and Merge Rules dialog box.
and Overlay Type page of the Overlay Analysis dialog
box includes the following options:
Specify the feature layer
or feature class to use as the source.
Specify the feature layer
or feature class to use as the overlay.
To use a feature layer,
you must add it to your map. To use a feature class, you must connect
to its data store, but you need not add it to the map.
The geometry in the feature
classes or layers you select determines the other choices in the
dialog box. You can combine only certain types of geometries. For
example, Union, Paste,
and Symmetric Difference support
polygon/polygon comparisons only. Also, you cannot choose point
geometries for both Source and Overlay.
If you select point geometry for Source, you
can select only polygon geometry for Overlay.
The available choices
for Type depend on the geometry
in the Source and Overlay.
If either the Source or
the Overlay contains multiple geometries,
you can select any feature class or layer in Overlay and
any overlay operation in Type. However,
the output may be empty if there are no valid geometry combinations.
Select the type of overlay
comparison to perform. For more information on the available types,
see Overlaying Two Feature Sources.
Determines the geometry that overlaps in the Source and Overlay features. Anything
that does not overlap is discarded from the output.
- Union: Determines
the geometry that exists in either the Source or Overlay geometry. Where
the geometry intersects, additional features are created. The resulting
layer is the sum of the two comparison layers.
- Erase: Determines
the geometry from the Source that
does not intersect with the Overlay.
The intersecting pieces are discarded.
Creates new features where the Source and Overlay features
- Clip: Like Intersect, Clip creates
features from the areas of the Source that
overlap with the Overlay. However, with Clip,
only feature attributes from the Source are
included in the resulting layer.
- Paste: Creates
new features by pasting the Overlay features
onto the Source features. All Overlay features
become new features in the resulting layer. In addition, areas of
the Source that do not fall within
the geometry of the Overlay become features in
the resulting layer.
- Symmetric Difference:
Determines geometry of the Source and Overlay that
do not overlap. Overlapping areas of the features are discarded
in the output, so the resulting layer represents the areas that
are mutually exclusive.