Data View

In the Data View you build the model of your system, entering the data structures, data, assumptions, modeling relationships and documentation for the Current Accounts and for each scenario. The screen is divided into four panes (marked by red boxes in figure below):


On the top left, a hierarchical tree is used to create and organize data structures under six major categories: Key Assumptions, Demand Sites, Hydrology, Supply and Resources, Environment, and Other Assumptions. The tree is also used to select the data to be edited, which is shown on the right of the screen. For example, clicking on the "Demand Sites" tree branch on the left of the screen will display the data for all demand sites on the right of the screen. Note that when you click on a tree branch, the associated object in the schematic will flash on the map. See Tree Overview for more information.

Inset Schematic

A small schematic of your area is located on the bottom left. When you click on an element, it will be highlighted in the tree (above) and its data will be displayed in the data entry tables to the right. Conversely, when you click on a branch in the tree, the associated element on the Schematic will flash briefly. Move the zoom bar (below the schematic) to zoom in or out. Alternatively, hold down the Ctrl key and click and drag to define a region to zoom in to. Hold down the Shift key and click and drag on the schematic to pan. When the mouse cursor is positioned over the inset schematic, rotating the mouse wheel will zoom in or out (ctrl+mouse wheel will zoom in and out faster).

If you have two or more monitors, you can "undock" the inset map to another monitor.   This can be especially useful for very large models.  In the Data View, go to the Edit menu and choose Undock Inset Map.

Data Entry Tables

The data entry tables on the top right are used to enter expressions that define Current Accounts and Scenario values of variables. Each data variable appears on its own tab; related variables are grouped into categories (selected via buttons). Above the data entry tables is a set of buttons giving access to the different variable categories associated with each branch. The buttons and tabs you see will vary depending on what part of the data set you are working on. For example, when editing demand sites you will see buttons giving access to "Water Use," "Loss and Reuse," "Demand Management," "Cost," "Priority," and "Advanced," while for reservoirs you will see buttons for "Physical," "Operation," "Hydropower," "Water Quality," "Cost," and "Priority." Click on one of these buttons to see the variables in that category. For example, "Water Use" has three variables: "Annual Activity Level," "Annual Water Use Rate," and "Monthly Variation." There are wizards to help you construct the expressions--see Expression Builder, Yearly Time-Series Wizard and Monthly Time-Series Wizard. There is a "Help" button next to the description of each variable that can be clicked on to retrieve more information about that variable.

Immediately above the data entry tables is a toolbar containing a selection box and the Manage Scenarios button. Use the selection box to choose which data to edit--Current Accounts or one of the Scenarios. Click on Manage Scenarios to create, rename or delete scenarios, or to change their inheritance relationships.

Data Entry Results, Notes, History and Expression Elaboration

The bottom right pane displays the data you entered in the top pane as either a chart or a table. These let you quickly examine the values generated by the expressions you have entered above. A toolbar on the right of the pane gives access to a range of options for formatting charts and tables (e.g. picking chart type and stacking options, colors, 3D effects, grids, number of decimal places, etc.) and for printing and copying charts and tables and exporting tables to Microsoft Excel.

The bottom pane also gives access to a notes screen: a word processing tool in which you can enter documentation and references for each branch of the tree. To edit the notes, right-click and select Edit to display the notes in a larger window, which includes a basic set of word processing controls. Notes can include formatting (bold, underline, fonts, etc.) and can also include standard Windows "objects" such as spreadsheets.

The History tab contains a customizable report of all changes made to the model, including changes to expressions and units, creating new schematic objects and branches, etc.  You can filter it to show changes for one or all scenarios, branches, variables or users, or by a range of dates.  The report is searchable (type search terms in the edit box below the report) and sortable (click on the column title to sort by that column), and can be saved to a file in Excel, Word, Acrobat, CSV, HTML, XML or text format.  See the toolbar to the right of the report for options.  A record of all changes made to data in the order the changes were made is also recorded in the text file Changes.txt (stored in the subdirectory for a WEAP area). Users enter their initials upon logging in when WEAP starts so that any changes can be catalogued in this file and attributed to a specific user.

The Elaboration tab contains the "Expression Elaboration."  Expression Elaboration is useful for helping you to understand and explain your analyses WITHOUT continually having to navigate from branch to branch in the tree.  It is divided into two sides -- the left side shows a list of branches and variables referenced by the current expression, while the right side shows all variables that reference the current variable.  If any of those referenced branches (on the left side) themselves contain references to other branches, they will also be shown.  Double-clicking on any item in either list will jump to the listed branch/variable.  You can also right click and choose "Copy" to copy the full list to the Windows clipboard.

You may resize each of these four panels by dragging the dividing bars between them.

See also: View Bar