Resource provided by UW-Madison Robinson Map Library. This data layer represents 911 Public Safety Answering Point (PSAP) service area boundaries in Jefferson County, Wisconsin in 2019. According to the National Emergency Number Association (NENA), a Public Safety Answering Point (PSAP) is a facility equipped and staffed to recieve 9-1-1 calls. The service area is the geographic area within which a 911 call is placed using a landline is answered at the associated PSAP. [This polygon shapefile represents boundaries of the 72 counties in Wisconsin. The data is derived from 1:24,000-scale sources.]