Graphs can be created visually with the Graph Builder, processed directly from the DAT and then saved as XML files. These saved graphs can then also be used as the input for the command line Graph Processing Tool (GPT) with a different set of input data products.
The Graph Builder allows the user to assemble graphs from a list of
available operators and connect operator nodes to their sources
Right click on the top panel to add an Operator. As Operators are added, their corresponding OperatorUIs are created and added as tabs to a property sheet. The OperatorUIs accept user input for the Operator’s parameters.
Connect Operator graph nodes by moving the mouse over the left edge of an Operator node until a circle appears. Then drag the mouse over the Operator node you wish to designate as the source. Every node except for a Reader node will require a source.
Before saving or processing a graph, the Graph Builder calls each operator to validate its parameters. Validation also occurs at the graph level to ensure there are no cycles and that each operator has the appropriate connections.