Nowadays, disaster occurs more and more frequently, which brings huge losses to\nthe society. Presented a GIS based emergency broadcast system (GIS-EBS), to provide rapid,\naccurate information to the public, can reduce the people�s losses maximum. Different from the\ntraditional radio data system (RDS), by adding broadcasting terminal control instruction on the\nFM signal, GIS-EBS extended the RDS protocol, which can control each radio terminal�s state.\nAnd through the extended RDS protocol, GIS-EBS can broadcast and release the emergency\ninformation to the right place and the people most in need in the shortest time.
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