About RF Propagation AnalyticsThe RF Propagation Analytics site demonstrates a practical application of analytics techniques. It lets you see what bands are open now (at least according to spots reported to the DX Cluster) and trends (both under the Activity button), can show maps of spot locations (both in flat Google map or Robinson projection), and lets you search for stations that have been reported or submitted reports (to DX Cluster).
How It WorksThe server checks the DX Cluster every minute to see what new spots have been reported. It gets the latitude and longitude of each spot (if available in QRZ.com) plus the solar flux at the time (if lat-long is not in QRZ, the country is determined based on callsign and the lat-long of the capitol of the country is used). It saves the spots in a database. The database is then used for searching and mapping functions. DxDisplay is a service to demonstrate high speed analytics, provided by The University of Alabama Center for Advanced Public Safety, in conjunction with HamSCI. See the Documentation for results of various studies of the historical data in the database.
See also QRZ.COM article about the system: QRZ.com article