Improve map precision in Holistics
Sometimes Holistics will not recognize one or more of the location names in your data. When this happens you will see a similar error banner at the bottom left of the map preview panel. Hovering on this banner will show you the list of all the unshown locations.
Note: this will only be visible in the data exploration view.
Troubleshooting
There are three main reasons Holistics might not be able to recognize your data.