4.1.3 Using the Operation Stack

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.

Click here to delete the operation from the stack permanently.

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.

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.

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.

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).

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.

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

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.