Getting started: Executing operation

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Executing an operation
Figure 1, example of an operation form. In this case, selected operation is “Resample Raster”. The opened form includes the fields that required for inputs, defining output and its format.

ILWIS operations are organized in form of a list which can be accessed by two tabs (Operation list and Operation By Keywords) from an opened Operation form. The tab Operation list display a list of operations sorted alphabetically from A to Z (ascending), while the tab Operation By Keywords display operations in form of categories using certain keywords associated with them.

To start an ILWIS operation:

  • From the Workbench in the Main window, click the Operation button
  • From the opened operation form, click the Operations list or Operation by Keywords tab
  • From the dropped down list, choose an operation by clicking it with mouse curser

An operation form is opened in which you can set parameters required for that operation including input(s), output(s), memory location and data format (Figure 1). The required inputs objects can be drag from the catalog and dropped to its associated fields in the form. ILWIS objects icons that can be selected as inputs are displayed on the right side of the field. The icons on the right side of the output fields refer to the type(s)of the generated output data.

  • Complete the dialog box by entering inputs using drag and drop
  • Choose “Memory” for the Output format
  • Click on the tab Execute to run the operation

The output of the operation, will be available in the Temporary Catalog during this session if the format chosen is memory. As soon as, the session is ended, the file(s) will be automatically removed from the Temporary Catalog. In case, you like to keep the results, simply use drag and drop; meaning drag the file you would like to save and drop it to the catalog where you want to save it. You may also use “Save as” operation to write the data e.g., to your local disk. If you do so, the file will be saved in the active catalog. You can also choose other output format from the list if you wish to save the result directly in the active catalog.