Apple Maps is one of the bundled search sites in my Quick Web Search macro, but you can do it on your own, as Maps has a URL handling scheme:
https://maps.apple.com/?q={SEARCH}
You could write a simple macro that asks for a location, then goes to the URL with the above form, though obviously with {SEARCH} replaced with the location you entered.
Assign it a keyboard shortcut, and you're done.
-rob.