The Department of Emergency Services (DES) in Chester County, Pennsylvania, began using geographic information systems (GIS) in its ComputerAided Dispatch Division in the late 1990s. In the beginning, GIS was used as a repository for countywide geographic data in the emergency-911 dispatching ...
Using GIS in Emergency Management in Chester County, Pennsylvaniadoi:10.1080/15420353.2012.662472Amy J. BlattTerraFirm International Corp.Journal of Map & Geography Libraries: Advances in Geospatial Information, Collections & Archives