For schematic scenarios, Source provides a background map image with overlaid nodes, resulting in an enhanced view of the current active scenario.
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If location has not been specified, the node is positioned at the centre of the map (datum by default). You can drag the node to the desired location or enter the location detail above the node list.
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You can set geolocation coordinates and elevations for nodes and reaches using the Location Control window (using View » Location Control). While it is not essential, it is convenient to set elevations with respect to Australian Height Datum (AHD). You can enter negative numbers for components that are below sea level, such as the lower lakes of the Murray. The elevation of a component is the zero point for that component. For example, the zero point for a storage is the lowest point in the storage.