Hi Will,
Greetings from Syncfusion. We have already had
a KB which explains how to group the marker in the map based on the zoom level.
We have attached the KB below for your reference to achieve your requirement.
KB: https://www.syncfusion.com/kb/12639/how-to-group-the-markers-based-on-zoom-level
If you have any further queries, please get
back to us.
Regards,
Yuvaraj.