1/23/2015 UT Dallas
POEC 6382 Applied GIS Software
Modifying numeric records in Feature Attribute Tables
CALCULATE assigns numeric values to items.
CALCULATE <cover> <feature_class> <target_item> = <arithmetic_expression>
CALCULATE <info_file> INFO <target_item> = <arithmetic_expression>
Example: Arcplot: calculate pub point key = 1
Arcplot: calculate pub.pat INFO key = 1
Example 2: Arc: tables
Enter command: select aircover.pat
Enter command: calculate air-id = aircover-id
Enter command: quit
Arc: list aircover.pat (to make sure variables correctly calculated)
- Requires that item key has been defined as numeric
- The CALCULATE command operates on all currently selected features within the coverage, or all selected records in the INFO file. This may be one, some or all records.
Note: there must be a space on each side of the equal sign: a = b