Map Management

Use Map Management to download maps for offline use, remove maps you no longer need, and check your device's map storage. You can download a whole area or select grid squares to save just part of it.

For step-by-step instructions, see Download Maps.

Open Map Management

Open the round three-line menu button at the bottom right of the map screen, then choose Map Management.

The Maps section lists your areas and their map types. Below it, Storage shows where maps are saved, and Verification lets you check downloaded files. The queue bar at the top shows the total queued download size and offers Cancel All Downloads.

Work with My Areas

1. In Maps, select Add Area.
2. Choose a Group and Area, then select Add.
3. Expand the area to see the map types available there.

For OS mapping across Britain, including Scotland, choose Countries in Group, then Great Britain in Area. You can then download the parts you need. Adding an area lists its maps; downloading is a separate step.

• World provides worldwide base mapping and is always shown in the list.
• Areas already in My Areas are not offered again.
• Where an area's menu offers Remove, it deletes that area's downloaded maps and removes it from the list. Areas required by your subscription cannot be removed from My Areas; you can still delete their downloaded map data.
• Area rows show the current status and downloaded size for that area.

Download maps

For a whole area, expand it under My Areas, open the map type's three-dot menu at the right-hand end of its row, and choose Download All. On desktop, Download All is also available in the toolbar when that map is selected.

For a smaller region, open the map type's three-dot menu and choose Download part of this map..., then select grid squares on the map. If its full mapping is already downloaded, the menu says Select mapping instead. The same action is available on desktop and mobile. See Download part of a map for the selection controls.

What the colours mean

The selection map adds coloured shading over the underlying map:

• Green: current mapping already downloaded on this device.
• Yellow: mapping queued or requested for download.
• Orange: older downloaded mapping that can be updated.
• Purple: squares you have selected for an action.

If green shading fills the screen, zoom out or use Fit to coverage to see its extent. Starting a selection on a fully downloaded square sets the action to Delete Selected. To download more mapping, use Clear and start on a square that is not fully downloaded.

What to expect:

• The queue bar shows the total queued size.
• A queued item shows a dot in the list.
• Active download work shows a spinner.
• If downloads are disabled in Settings > Data, OMN4 blocks new download actions until downloads are enabled again.

Remove downloaded map data

To delete all downloaded data for a map type, open its three-dot menu and choose Delete All.

To remove just part of a map:

1. Open its selection map as described in Download part of a map.
2. Use Clear if you already have a selection.
3. Start by selecting a green, fully downloaded square, then select the other squares you want to remove. Selected squares have purple shading.
4. Check the area and size, then choose Delete Selected from the desktop toolbar or the round three-line menu at the bottom right on mobile.

To remove an area and its downloaded maps from My Areas, choose Remove in the area's menu where available.

• Removals are queued like downloads.
• If a map shares downloaded tiles with other areas, OMN4 asks you to confirm before deleting shared data.
• If downloads are already running, OMN4 blocks removal until the queue is finished or cancelled.

Understand the status line

Each map row shows a status on the left and size information on the right.

• Not on device means nothing is stored locally for that map.
• Partial on device means only part of the map is stored.
• On device means the full current coverage is already on the device.
• Partial Outdated or Downloaded Outdated means OMN4 has older downloaded data that can be updated.
• Preparing Download, Downloading, or a size followed by left means download work is being queued or is active.
• Queued for removal or Removing... means delete work is in progress.

Manage storage

Open Storage to review where map data is kept.

If you want the detail on why map sizes and storage totals can differ, see Storage and Verification.

• Storage Locations shows each available location, its current size, and which one is used for new downloads.
• Use Add Location... to add another folder where multiple storage locations are supported.
• Use the radio button beside a location to make it the default for new downloads.
• Removing a storage location deletes any maps stored there after confirmation.
• Use Move to... from a map row menu to move one map's downloaded data to another available location.
• Other Storage lists streamed cache and other map-related storage that OMN4 tracks separately.

Some storage actions only appear when they are available. For example, Move to... only shows when another usable storage location exists for that map data.

Verify downloaded map data

Use Verification when downloaded maps look wrong, seem incomplete, or you want OMN4 to re-check the files on disk.

1. Open Verification.
2. Select Verify Map Data.
3. Wait for the progress bar and status message to finish.
4. Review the summary. OMN4 shows warnings or a cancelled state if the check did not complete.

While verification is running, downloading, removing, and moving map data are blocked.

Maps without a selection grid

Some data can only be downloaded as a whole area. Its row menu offers View coverage instead of Download part of this map... or Select mapping. Use the row's download action for that data.

Related Topics

• Download Maps
• Storage and Verification
• Map Types and Scales
• Streaming vs Offline