Deleting a rounding rule
You can delete rounding rules, their associated rounding rule intervals, and primary and secondary mappings from the Rounding Rule Definition dialog box.
Steps:
 Start ArcCatalog.

Add the Rounding Rule Definition tool to a toolbar by completing the following steps:

On the main menu, click Customize > Customize Mode.
The Customize dialog box appears.
 Click the Commands tab.
 In the Categories list, choose Nautical.
 In the Commands list, click and drag the Rounding Rule Definition button to a toolbar.
 Click Close.

On the main menu, click Customize > Customize Mode.

Click the Rounding Rule Definition button .
The Rounding Rule Definition dialog box appears.
 Click the Rounding Rules dropdown arrow and choose an existing rounding rule.
 Click Delete.
 Click OK.
The rule, associated rounding rule intervals, and any primary and secondary mappings are deleted.
4/19/2012