Smart Map supports the following plugins for importing address data:
Before you run the import, it's important that you already have the latitude & longitude in your original data. You'll be able to simply set latitude & longitude alongside the other address data, and import it all at once.
There is currently no mechanism within Smart Map for doing bulk lookups. It's highly recommended that you include the coordinates in the initial import.
Here are a few recommended services for doing a bulk lookup:
Once you've got the latitudes & longitudes included in the CSV file, you can easily import all of the data at once.