Turn your iPhone into an outdoor or marine GPS, with USGS maps and NOAA charts.
The app includes access to the USGS topo maps for one state of your choice, and all the NOAA raster marine charts for the entire US. Additional USGS topo maps are $10 per state.
Although the app can be used standalone, the maps and overlay data can be used on your home computer for planning, and for printing maps on paper. Then upload everything to your phone and enjoy navigating outdoors with high quality maps.
When you get home you can transfer your tracklog and points of interest back onto your computer, to see where you actually went, analyze your speed and elevation profile, and so on.
Features:
+ Fast scrolling and zooming
+ Import and export GPX files
+ Wide range of maps and charts available for many parts of the world (purchased separately)
+ Auto-rotate screen, or lock in your preferred orientation.
+ Screen lock to prevent accidental screen touches while recording a track
+ Shows speed and direction of travel, even while walking slowly
+ Support for GPS and Compass sensors, where available.
+ Placename index
+ Moving map, lock GPS position and automatically scroll the map
+ Records tracklogs.
+ Create and edit marks, which may be linked to a web URL
+ Plan routes, measure distance and bearings.
+ Shows Altitude
+ Lat/Long, UTM and British National Grid coordinate systems
+ Email position marks or tracklogs as GPX files
Battery Use Disclaimer: "Continued use of GPS running in the background can dramatically decrease battery life."
