4.1.3 Using the Operation Stack

The Operation Stack is a flexible tool for processing data, allowing you to quickly change the order of operations, change parameters for each one, and temporarily ignore (but not necessarily delete) operations. It is a dynamic list of all operations applied to a survey. Operations are added from the shortcuts along the top of the main window, or from the Operations menu. Previously created operation stacks and wizards can also be loaded and applied to a survey, and edited in the same way. When the Difference button is depressed (located in the right panel), you can see what each operation has removed from the survey.
IMPORTANT: When a project or survey is first loaded it is displayed as it was left when the project was closed, but in order to edit operations or use Difference you must run the stack by clicking Run Operation Stack at the bottom of the panel.
4.1.3 Using the Operation Stack

Move Up/Down

1. Move Up/Down
Use these arrows to move an operation up or down in the stack. Operations at the top are performed first, while those at the bottom are last.


2. Delete
Click here to delete the operation from the stack permanently.

Check Box

3. Check Box
Uncheck this box to ignore an operation. You must click Run Operation Stack to see the effect of temporarily omitting an operation. Check the box again if you want the operation included in the processing and then click Run Operation Stack.

Label Bar

4. Label Bar
Each operation is represented by a label bar with the its name (or expression if a Calculator operation). When this bar is depressed the operation is open and you can change its parameters. When an operation is first added to the stack it is open. Running the stack will close it and button will no longer be depressed. When you depress the button the survey display will change to show what it looks like before the operation is applied. By clicking the label bar, then, you can see the effect of the operation before (open) and after (closed). If the operation is not the last in the stack then when it is closed you will see the result of the entire stack.
When the Difference button (located on the right panel) is depressed, opening and closing operations has a different effect. When all operations are closed the difference button shows the difference between the original survey and the result of all operations (so long as they have all been run). When any single operation is opened, you see the difference between the survey before and after that operation is run. Using the difference button you click on each operation bar and see what was removed, if anything. If nothing was removed (in the case of resample, for example) then the difference is zero and you will see one solid color for the whole survey.

Selection Copy

5. Selection Copy
To select the same area as in a previous operation, choose a number from this drop-down list that corresponds to that operation's place in the stack. For example, if the first operation (Operation 1) in the stack operates on a selected region using the box selection method, I can choose "1" from the list to select the exact same area.

Selection Method

6. Selection Method
All operations have the option to work on "all" (the entire survey), while many have the option to work on a selection of tiles (click with the mouse in the survey image in the center of the main window to select them) or a box (region drawn with the mouse by holding the left mouse button down).

Band Buttons

7. Band Buttons
For Multiband Surveys, most operations allow you to select which bands you would like to operate on. All bands are selected by default. To unselect simply click the button and they will "pop" out.


8. Parameters
Parameters are what uniquely define or limit an operation. See Operations for details.


9. Run
Click this button to run the operation stack whenever changes have been made and you want to see the new result. The button should appear red (either border or shading, depending on your operating system) when the stack should be run to see the most current results. It appears green when up to date. It is also a good idea to run the stack whenever it is opened for the first time (when a project is loaded or a previously created survey added to a project), even if the button is green, because ArchaeoFusion only saves the image of the latest result and recalculates all operations from the raw data when the project is re-opened.
Last Updated June 15, 2011