Overlay Analysis dialog box - Set Output and Settings page
 
 
 

Use this page of the Overlay Analysis dialog box to specify the information about the output layer, and to set tolerance levels for sliver polygons and the evaluation of points. Overlay results use the split rules set in the Split and Merge Rules dialog box.

To perform an Overlay operation

Analyze tabFeature panelFeature Overlay At the Command prompt, enter MapGisOverLay

The Set Output And Settings page of the Overlay Analysis dialog box includes the following options:

Output

Specify the name and location of the SDF file that will contain the result of the Overlay operation.

Layer Name

Specify the name of the Display Manager layer that contains the result of the Overlay operation.

Sliver Tolerance

When the Overlay operation splits features to produce the output layer, it tries to eliminate polygons that are smaller than the specified tolerance settings. Such polygons might have been present in the sources, and some may be produced by the Overlay operation itself. The elimination of slivers affects the output layers only.

Polygons that are larger than the Maximum value become separate features in the output layer. Polygons that are smaller than the Minimum value are merged with a neighboring polygon. The Overlay operation checks polygons that fall between the two values to see how wide they are. If they are very narrow, they are merged with a neighboring polygon.

NoteIf the resulting polygons are not as desired, try adjusting the tolerance values and repeating the Overlay operation.
Minimum

Specify a value in the current units. If a polygon is smaller than this value, it merges with a neighboring polygon.

Maximum

Specify a value in the current units. If a polygon is larger than this value, it becomes its own feature.

Suggest

Click to see recommendations for the Sliver Minimum and Sliver Maximum values (if they are not already displayed).

Units

Specify the units to use for the sliver Minimum and Maximum settings. The available units depend on the Source coordinate system.

Don’t Remove Slivers

Select this check box to have the Overlay operation ignore sliver polygons.

Ordinate Tolerance

Specify how far apart two nodes or vertices of a line or polygon must be to be treated as separate points.

Length

Enter a distance in the current units. Any two points that are closer together than this value are treated as a single point in the output layer.

Units

Specify the units to use for the Ordinate Tolerance Lengthsetting. The available units depend on the Source coordinate system.

Output Properties

Specify which properties from the Source and (if applicable) Overlay are included in the resulting layer. “All” adds all properties to the resulting layer. “Identifiers” adds only the primary identifiers (primary keys or unique fields, such as Feature_ID). “Non-Identifiers” adds only the non-key attributes (such as Land_Value or Speed_limit, for example). If you add only non-identifiers, the overlay operation generates primary identifiers for the features in the resulting layer.