Zone Data Display

The Zone data display shows the most recently available 48 hours of demand history for the selected internal zone. Please note that the IESO publishes its zonal demand data approximately every 7 days, so sometimes this data is more than one week old.

Zone Data Display

Narrowing/Widening the graph timespan

The data display will show 2 days worth of data by default. You can change this by selecting a number from the 'Display n days of data' combo box. If you narrow the time range, then you can always scroll left or right by clicking and holding the middle mouse button anywhere on the chart and moving the mouse left or right.

Specifying the number of days to view on the graph.

Zooming in/out

To zoom in on a section of the graph, click and hold the left mouse button on the graph and drag it down and to the right until the rectangle that appears surrounds the area that you wish to zoom in on, then release the mouse button. To zoom back out, left-click and drag the mouse cursor upward and to the left and then release the mouse button.

Selecting a period to view

By default the 'Synch with Displayed Time' checkbox is checked, meaning that the labels underneath the graph will show the latest data (even if this is more than one week into the past). If you uncheck this box, the vertical dotted-line will become cyan and you can select a time period to view by left-clicking on the chart at a time that interests you.

Selecting a time period to view on the graph.

Exporting to CSV

To export data to a .csv file, make sure that the demand series is active (checked) on the graph and then click the "Export Selected Series to CSV" button. The "Save As" dialog will appear. Simply go to the directory where you want to save the file, enter the filename and click the Save button. The file should now be available in the selected directory containing the demand data from the graph.