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Maps automatically download data on-the-fly as you scroll around the map. All the areas you view are saved on the device and may be viewed again without access to the internet. But if you are planning a trip outside an area of internet connectivity (or if mobile internet data is expensive), you can download the detailed coverage you need in advance. There are a number of ways you can do this:
+ For seamless topo maps, such as OS Landranger and OS Explorer maps:
Along a planned route:
Plan the route you are going to travel (See Routes). Include any side trips or escape routes you might need.
Open the detailed map you want to download/activate.
Right-click on a waypoint, or tap a waypoint then tap the blue context button  to show the menu
Select Route Operations, Download map along route
A typical route takes only seconds to download, so this is the recommended technique to use at the trailhead or any time you have a mobile data signal.
Downloading a custom area:
Create a route that encloses the area of map you want
Place the last waypoint close to the first one. It does not need to be exact, as the polygon is automatically closed
Open the detailed map you want to download/activate.
Right-click on a waypoint, or tap a waypoint, then tap the blue context button to show the menu
Select Route Operations, Download enclosed map
It only takes a few minutes to download an area as large as, say Yorkshire, or the Simpson Desert. So this is the recommended technique to quickly download a region before a trip.
Downloading the whole map:
Some detailed topo maps are extremely large (tens of GBytes), which is why we provide the route-based tools (above) to enable you to easily download just the areas you need, without filling up your device with data that you will never need to look at.
However, some seamless topo maps are a more reasonable size, and there are times when it is convenient to have the whole map downloaded for unexpected use in the field. For example, search and rescue personnel may need a map of any part of their area at short notice.
In the map list .png) , tap the blue info button.png) beside the map you wish to download, and tap Bulk Download. If this feature is enabled for the map, click the Download Whole Map button.
This operation may take several hours. Plug your device into a power supply, leave it turned on with Memory-Map running in the foreground.
With iOS and Android, there is no guarantee that the operating system will retain large files that are seldom if ever used. If you install large amounts of mapping on a phone you must ensure there is ample space free at all times after installation. Most people fill up their phones with photos, videos and movies. If you let the phone memory fill up, the operating system will automatically delete large unused files, and your map will not be on the phone when you need it! We recommend you keep your phone's storage no more than 75% full at all times.
+ For maps provided as a set of individual sheets, such as the Hema 4WD maps or nautical charts:
Download a Package
Scroll to view any part of your area of interest
In the map list , select My Online Maps in the top row of buttons
Look for a listed item under "Packages"
When you tap that it will download all the maps in the package
At a later time, you can tap Maps, Menu, Check for Map Updates. This will ensure you always have a complete set of up-to-date charts for all the packages you have downloaded.
+ Downloading all activated areas (for DMS selections maps)
If you have a map that was purchased by the square kilometer (only a few maps sold around 2010-2014), and you have migrated your license from another computer, you can download the areas of the map that have been activated.
In the map list, tap the blue button beside the map you wish to download, and tap Bulk Download. If this feature is enabled for the map, click the Download Activated Areas button.
Note that we no longer sell any square-km maps. They have been complex to use. If you are struggling with installing or activating an old map, we recommend deleting the old map from your device and buying a new edition map. You will find it much easier to use.
If you are going to leave the phone unattended while it downloads the data, plug it into a power supply and leave it turned on with Memory-Map running in the foreground.
All the map data, once loaded, is cached for future off-line use. If you want to free up some of your iPhone's memory, bring up the Map list, tap Maps on Device and Maps Everywhere. Decide which map you want to delete and tap the blue info button to the right of the map. Tap Delete Map. If the map is licensed, this does not delete the license. You can download the map again in the future and use it any time.
You can also back-up and restore your map data using a thumb-drive or other storage service supported by your device.
Next: Visualizing downloaded and activated areas
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