1. A method, comprising: receiving flow data associated with a traffic flow, the flow data tagged with a data source identifier identifying a data source exporting the flow data, a source site identifier identifying a site associated with a source device of the traffic flow, and a destination site identifier identifying a destination site associated with a destination device of the traffic flow; determining at least one authoritative data source for each site and metric type using at least one selection rule; receiving a query for de-duplicated flow data; and generating de-duplicated flow data based on the data source identifier, source site identifier, and destination site identifier and particular flow data associated with the determined at least one authoritative data source.