After adding a new field to a coverage attribute table, that field can be populated based on values contained in existing fields. Instructions provided describe how to calculate the values of one field to another field of a coverage.
In Workstation ArcInfo, use CALCULATE or MOVEITEM in ArcEdit, ArcPlot, or INFO. In Desktop ArcInfo, use the Field Calculator as shown below.
1. Prepare coverage for editing.
2. Open the Field Calculator on the field to be populated.
3. Define the calculation.
4. Stop Editing and save edits.
Use the Properties of the layer in ArcCatalog to add new items. See Chapter 10 of the "Using ArcMap" tutorial for more information.