Many errors, like the double-digitized line, need to be fixed one at a time by deleting, modifying, or moving individual features. Some errors must be fixed by creating new features. However, sometimes a feature class contains a number of errors, such as the overshoots and undershoots, that are simple to fix. When this is the case, you can select multiple errors at once with the Fix Topology Error tool and apply the same fix to all of them.

If you prefer, you can individually check each error using the Error Inspector. This is a work flow and quality assurance decision that your organization should make before you begin applying topology fixes to multiple errors.

Before applying a fix to multiple errors, it’s a good idea to look at your data and evaluate whether the fixes are appropriate. You would not want to trim lines with dangles that actually needed to be snapped to another line, or extend a line that actually needed to be trimmed. Usually the Maximum Distance constraint will prevent this from being a problem with the Extend and Trim error fixes.

In this case, if you extend dangling lines that are within three feet of another line, you’re not likely to cause problems with your data, since the parcels and rights-ofway are larger than three feet.

You’ll use this method to clean up several errors at one time.

Drag a box around the errors that you want to fix with the Fix Topology Error tool. Right-click, and choose the fix that you want to apply. In this example, the Extend topology error fix is applied to all features that can be extended to another feature within three feet. This modifies several features and creates new dirty areas.

This example does not show Trimming all of the errors, but applying that fix would result in about 50 more errors being resolved.