Spmap Using Individual Level Data

[Alexander Hall]

I am currently trying to map census demographic information by county in a state. I have the shapefile for the map info and a list of individual responses from the census. I successfully merged the data, but I the spmap command, and returned error: "Variable id specified in option id() does not uniquely identify the observations". This is naturally as a result of there being multiple individuals, and thus data entries in each county. Does anyone know a solution to this?

[Andrew Musau]

You probably need to tag one individual in each county to map. See the -tag()- function of egen or the contract command.

help egen

help contract