How to start operations

ILWIS operations are listed in the Main window in the Operations menu, in the Operation-tree, and in the Operation-list.

The Operation-tree provides a tree structure for all ILWIS operations, similar to the Operations menu in the Main window;
The Operation-list contains an alphabetic list of all ILWIS operations.

To start an operation:

open the Operations menu in the Main window, and choose an operation,
double-click an operation in the Operation-tree or the Operation-list,
click the right mouse button on an operation in the Operation-tree or Operation-list, and select Run from the context-sensitive menu,
click an input object with the right mouse button in the Catalog, and select an operation from the context-sensitive menu,
drag a data object from the Catalog to an operation in the Operation-tree or Operation-list, or
type a command on the command line of the Main window (see also Appendices : ILWIS commands).

A dialog box is opened in which you can enter the input and output object names and other parameters necessary for the operation.

When you click the Show or Define button in the operation's dialog box, an ILWIS expression is generated on the command line of the Main window.

Output objects that are obtained through an operation's dialog box are always dependent.

Advanced users can type complete ILWIS expressions on the command line of the Main window or create a script to execute a series of expressions. For more information, see Appendices : ILWIS expressions and Appendices : ILWIS script language (syntax).