You're right in that location based analysis can often highlight interesting things in data. Postal codes are common in many countries. I have used Australian postcodes along with postcode population density information, to do some covid related dashboards some years ago. It's also possible to do geocoding, e.g. using Google's API https://developers.google.com/maps/documentation/geocoding/overview (there are others), to convert addresses to lat/long and also to then get postcode information. I have used that in the past to do distance calculations using the haversine formula, between GPS coordinates so you can then include a distance element in your events where relevant, e.g. to answer the question "where's the nearest...?" What is the challenge you face - is it getting reliable postcode data from your event data. You can sometimes find good sources of postcode to gps coordinates, I found some Australian downloadable CSV files containing Suburb/Postcode/GPS coordinate data that I used as a lookup dataset which you can then use in your dashboard.   ... View more