Google Map Domains
The following countries are currently supported in the Store Locator Plus plugin. These countries determine the default center starting point for location searches and determine which Google locations engine is used when searching for an address. This influences, but does not restrict, which results are returned. Regardless of what country you select as the default, any location in your location database can be returned by the search regardless of the country in which that location resides. This does not effect the zip codes necessarily. Some country postal codes are unique, others are not.
The Experience add-on for WordPress SLP or the Professional Plan for MySLP provides a “search by city”, “search by state”, and “search by country” feature. This search form element, when enabled, will build a drop down list based on the locations in your database. This is meant to provide a hint to the user where your locations are.
The base legacy plug-in is a simple “address input” feature. When the user clicks the search button it looks for locations closest to that location based on your other search form settings. If your default radius is 100 miles and the user selects the state of Texas, the base plug-in will search for all locations within 100 miles of Google’s estimated “center of Texas”. With the Experience add-on you can select certain settings to redirect the search selector and provide other options to direct or assist your site visitor.