How to Cluster Latitude/Longitude Data of Suburbs with Same Names?

[trip6]

I have a list of latitude/longitude data grouped by suburb names across the country.

The problem is for common names the list contains lat/long data corresponding to multiple areas. So Yorktown may have 20 data points which actually correspond to 8 different locations.

Whats a good method to group or cluster these data points?

Thanks!

 

[Bob3141592]

Are you looking for a mathematical equation or a computer algorithm?