All features in the Input coverage are divided into two sets: a selected set and an unselected set. The selected set comprises the features to be merged, extracted, or deleted. At the start of the Select tool or Eliminate tool, all features are selected. You must use a query to identify the features to be in the final selected set.
Steps to Building an INFO Query
- Open Query Builder.
- Choose a Selection method:
Choose an item from the Items list; for example, LENGTH. (Notice that the Values list on the right is populated.)
Choose an Operator from those available.
Choose a value in the Values list, for example, 5000. (Notice that the Current expression text box is updated with every selection you add.)
To extend or constrain your expression, choose a Connector such as 'AND' or 'OR' and repeat steps 3 through 5, and possibly 6 as needed.
Click the down arrow to add your expression to the list.
Repeat Steps 3 through 7 to build additional expressions in your query.
- Subset—Reduces the selected set of records with a selection expression to those that meet its criteria. If no selection expression follows, the selected set will be empty. To see examples, refer to Subset query examples.
- Add—Adds unselected records that meet the selection expression criteria to the currently selected set. If no selection expression follows, the selected set will contain all features. To see examples, refer to Add query examples.
- Switch—Reverses the current selection to the unselected set. NOTE: Switch is always used by itself. Using Switch twice in a row returns you to the initially selected set.
Adds the current info expression and method to the expression list.
Removes the selected info expression and method from the expression list.
Moves the selected info expression and method up the expression list.
Moves the selected info expression and method down the expression list.