I know Tableau has mapping support for mapping congressional districts, but how do I do it? I currently have two fields in my table: [STATE] and [DISTRICT_NO].
I created a custom field that combines the two:
[STATE] + " " + STR([DISTRIC_NO])
which produces strings like: CA 2, IL 1, AZ 3.
I formatted the custom field to have a Geographic Role: Congressional District.
What am I missing?