Beyond providing standard geocoding for geolocations such as City, State, Country, Country/Region, Zip Code, Postal Code, and County, Tableau also allows us to custom import their own geocoded files. Custom geocoded files are useful if we have locations that Tableau can't map, for example, a street address, or if there is a custom geographic field that we want to define, and so on.
To create a custom geocoding, we need a .csv file to import into Tableau. This file must contain Latitude and Longitude columns as real numbers, with at least one decimal point in them. Other than these two columns, the other columns will depend on whether we are extending an existing role or adding a new role.
