I have a map with about 250 markers on it. I exported the markers file and opened it in Excel so that I could quickly make some batch changes to the icons based on the marker group. I then saved the file and attempted to import it into my map, but nothing happened.
Thinking that I might not have been able to import over existing data I created a new map and changed the map id in the data so that the markers would apply to the new map and tried to import again. Again, nothing happened.
Initially I was trying to find the marker data via PHPMYAdmin so that I could make the edits with some quick SQL statements, but I was unable to find where the map data is stored.