If you have allowed your survey to be answered anonymously, but would still like to sort your results geographically , you can do this by asking for location data from the user in your survey.
Using the above options from 'Add a Survey Element', you can collect postcode or address data for the users.
By default these questions are set to only display for anonymous users, as you will already have this data for any registered users who answer the survey.
You can also gather location data from the user regarding a point on a map. This could, for example, be used to pinpoint where an issue in their area is taking place. You can then view all locations that have been chosen by respondents on a map in your results.