Find an interesting area:
Zoom in to the individual maps:
Or search for a map or park:
View the selected map:
Zoom in:
Mosaic adjacent maps:
Show your current position:
Show coordinates:
Measure distance and bearing:
Once you have installed a map it can be viewed without any network connection. So download your maps before you leave home, and then don't worry about needing cellular or WiFi coverage.
Map downloads are free - all you pay is the initial price of the app.
For a complete walk-through of all the app's features, see the user guide.
Topo Maps is now available from Apple™'s App Store in the Navigation category for only $7.99.
Please also have a look at another of my iPhone apps, Panoramascope : Augmented Reality, which computes the view visible from almost anywhere on earth, and can superimpose it on the iPhone's camera image so that you can identify the peaks that you're looking at.