Grabbing the existing address data to use with Smart Map
I'd recommend migrating all of your map data into a Smart Map Address field. Once you've got everything contained within Smart Map, it will be much easier to render maps and conduct proximity searches.

The best way to migrate would be to use something like Feed Me...


Create a simple JSON or RSS feed which contains only (A) the entry ID, and (B) the VZ Address data.
Pull that feed right back into the same site, putting the address data into your Smart Map field.


Once you’ve migrated to Smart Map, it opens up a lot more possibilities for using that data!