Clarification on Geolocator

[DSkkk]

If have a Requirement where i need to find the Nearest Branch to a Customers Address. For this we intend to use Geolocator.

what we plan to do is
1) Find the Latitiude and Longitude of the Customer Address by using the QS Match Stage and by matching the Customer Address file with the XXX Geolocator file which has Lat and Longitude for all the ADDRESSES in U.S.
2) then find the lat and long for the Branches
3) Develop a DS Job to calculate the Distance between the Lat's and Long's of the Customer and Branches, using a simple Distance formula.

My question is : Which XXX Geolocator file do we need to use for Matching purposes for getting the Latitude and Longitude from matching.

And is this procedure correct as we have no experiece using geolocator.

Any help from those who have a good understanding about Geolocator would be greatly appreciated.

Thanks.