Study and realization of city emergency united deployment based on DDYGISS

DDYGISS is a highly integrated platform of WEBGIS.It is based on 3S(GIS、GPS、RS),object-oriented RDBMS,Internet,DCOM,etc.At the same time it is a development and application platform oriented resources integrating,resources sharing and application services.The paper puts forward a method by which GIS and city emergency united deployment are highly integrated by virtue of second development based on DDYGISS.In this way,it has realized united deployment of telephone alarm and GIS Emergency.With DDYGISS,the accurate position of alarm-giving place is displayed and reasonable emergency plan is selected.The perfect result has been obtained.