Google Maps has become an essential tools for travellers and anyone interested in exploring the world around them. iPhone users have built in access to this wonderful web site on the home screen, but it is well worth considering installing Google Earth. The key advantage of Google Earth over standard Google Maps is that maps can be viewed in three dimensions.
The iPhone's hardware has been put to superb use in this excellent port of Google's globetrotting tool, and a quick tilt of your mobile is all that is needed to start exploring terrains in three dimensions. The app can determine your current location so you can explore the surrounding area, but a search tool is alos on hand to enable you to track down other places of interest.
Whilst browsing the Google Earth maps, various layers can be displayed to show different types of information. This includes the Panoramio layer which makes it possible to browse through million of geo-tagged photos from all over the world. Geo-location also comes in handy when you are researching places around the world as the app provides links to related Wikipedia articles enabling you to easily find out more about places of interest.
With constant updates, there is always something new to explore, and the fact that Google Earth is provided free of charge means that there is simply no reason not to download it. Whether you're using the app for fun or to learn about places you intend to visit, it is wonderfully easy and intuitive to use.
Taking mapping to the next dimension, Google Earth survives the transition to the small screen and greatly benefits from touch screen support.