Hi chubasco,
Your ip address, when connected to SecureLine, comes from a pool of ip addresses we have. So yes, your IP address is hidden.
The reason why the map service may be able to determine your location is because of the location algorithms that services like Google Maps uses. It may, for example, be based on previous location data is has for you. Googleis pretty much aware of where you are at all times and is able to identify your location, so that may be one of the criteria they use. Another criteria may be the ip address of the wifi router. Long story short, those services use complex decision making algorithms which would take into account several criteria and therefore make an "educated guess" that you are in the expected location.
Hope this makes sense.
Best regards,
Davidek