Graphical Data Interface (GDI)

The Graphical Data Interface (GDI) provides map style graphical access to the model data. The GDI allows the inclusion of bitmap (BMP), Drawing Interchange File (DXF), or Shape (SHP) files as a reference background. Using the GDI, the User can draw the model schematic using point-and-click mouse entry, coordinate value entry, or relative distance and angle entry. The GDI provides pop-up data screens for editing and viewing of the various pipe, node and customer data and analysis results.

The GDI includes a wide variety of tools for modifying the pipe, node, and customer model features including routines for adding, deleting and moving features - and the ability to undo accidental changes and deletions. Three independent display panels support various zoom commands including the ability to zoom in by a User specified window, zoom by a User specified scale, and zoom to a previous view allow the User to easily move around the model image. A robust set of colour coding and tracing routines enhance the User’s ability to graphically review the analysis results and the system’s performance. The trace routines are complimented by the inclusion of what we refer to as “attribute” valves. The attribute valve feature was developed to assist in the design and layout of emergency isolation areas. A complete set of annotation routines allows the User to include notes and references in the model graphics.

The GDI tools are accessed through descriptive tool icons contained on function based “fly-out” tool bars, through a command line and list interface, and through a floating tool palette which can be arranged, sized, and placed to meet the User's preference.