When you open the geographic data viewer through your Internet browser, you will see a window like the example shown here.

At the top will be the usual browser interface. Don't press any of the browser buttons on the Browser Interface, while the interactive map is open. The map is displayed in the main window of the Geographic Data Viewer. On the left, you see the Toolbar. You will use the tools to look at, ask questions of, and change the map. On the right is the Layer/Legend Panel, where you can control what layers are visible on the map. Below the Map Window is the Attribute Panel, where attribute information about the features on the map are displayed.

Everything will be discuss in depth in the following sections.