How to update the center position of the map?

If you want to update the center position of your init map on the Store Locator. You just update the value under settings.

How can I get Latitude & Longitude?
It is really simple to get the Latitude & Longitude.

Please follow the below steps.
Open https://maps.google.com/

Go to your center position which you want to display on your store locator map.

You can set zoom level based on your need.