I've noticed that store location pages of various Australian retailers and services don't initially position and zoom directly into the users current location even when the GPS coordinates are known by the map.
They either zoom to the country or state. And only zoom to the users location when the option was selected on a previous page.
In the page I'm building I'm including a single text field for a location search, which would take a state, suburb name or postcode, or combination that will generate a list and position the map. And also a Current Location button.
I'd like to know the rationality behind the different initial zoom level options such as country and state, and what affect it has on the user experience? Why don't they set the initial zoom and position to the users current location without the user opting for it? And what considerations should I make when deciding what initial zoom should I make?
Also note that in my situation I have about a thousand different locations around Australia, tending to cluster around municipal areas.