This article assumes you have already installed the Earthmate app on your iPhone or iPad. You can install the app by searching for "Garmin Earthmate" in the app store.
Due to the possible size of the maps it is highly recommended that you download the maps over Wi-Fi instead of over the cellular network that your phone is on.
The Earthmate app provides free topo maps as well as NOAA charts. To download maps do the following:
1. Tap the "Map" icon.
2. Tap the map layers button.
3. Tap on "Download Maps"
4. Use your finger to select the area that you wish to download. You can pinch-to-zoom in order to zoom in and out of the area of interest. Tap on the "Next" button to continue.
5. A list a relevant map tiles will appear. Tap on the maps that you wish to download. When a selection is tapped a checkmark will appear. Tap on the "Download" button to being downloading the maps.