Self-Intersection Detection
Detect Self-Intersections
The symbol displayed in the Self-Intersection Detection area of the dialog box displays on the map wherever a self-intersection occurs. Click the symbol to display the Symbol Style dialog box, which allows you to select your own symbol.
Overlap Detection
Detect Overlaps
Check this box to enable overlap protection. When overlap protection is enabled, the region style displayed in the Overlap Detection section of the dialog box displays on the map, indicating regions created from overlapping regions. Click the region symbol to display the Region Style dialog box, which allows you to modify the fill and border of the overlapping regions.
Gap Detection
Gaps are closed areas between regions that do not contain objects. While some gaps may be legitimate (for example, the Great Lakes between the United States and Canada in the WORLD.TAB map), small gaps often reflect poor boundary matches between regions. Overlaps may similarly represent poor boundary matches.
Detect Gaps
Check to detect gaps that are less in area than that designated in the Maximum Gap Area and Area Units fields.
Maximum Gap Area
Enter a number that to be used with the designated area units from the Area Units drop-down list.
Area Units
Select an area unit from the drop-down list.
OK
A check is performed.
Cancel
Cancels the operation.
See Also: