The States48 data set contains geographical data for the 48 contiguous states in the United States. The data are used to create a map
of the continental United States. To create a map, plot lat versus lon, and select state and segment as ID (grouping) variables.
The following list describes each variable.
statestate code identifier
segmentsegment code identifier for a state
postalpostal code identifier for a state
lonlongitude of each point of a state segment, in degrees west longitude
latlatitude of each point of a state segment, in degrees north latitude