The SMC Gateway is able to access maps saved to a USB drive, for when you cannot get any internet connectivity.
This page will discribe how to do this using a free program named Maperitive.
Download and Install Maperitive
To start, go to Maperitive’s website here, and download the latest version of Maperitive. Unzip and run the Maperitive.exe.
Prepare your offline mapping
First zoom all the way out on the map. In the bottom left you will see your zoom level at “Zoom 1”.
In the command prompt at the bottom type the following, “generate-tiles minzoom=1 maxzoom=6”. This will save all the tiles needed for a full view of the world, down to a level of zoom which will roughly cover the UK.
These files will be saved in your Maperitive folder in a new folder named “Tiles”. In the Tiles folder you will see 6 folders named “1” to “6”, these folders hold the map tiles for each particular level of zoom.
A good tip is to save these 6 folders, and incorperate them into every offline mapping USB drive you need, as they will rarely differ as the level of zoom is so great.
Plotting the area you need
Now zoom into the area you need, in our example we are plotting a section around Southampton. Right click on the map and choose “Place Geometry Bounds Here”.
A red square will appear, drag the corners of the square until you are satisfied.
Grabbing the remaining zoom levels map tiles
Now we need to gather the rest of the tiles for our section.
Type into the command prompt “generate-tiles minzoom=7 maxzoom=17”. This will grab the tiles from zoom level 7 through to 17, remembering we have 1-6 already done.
If you need the closer zoom levels of 18 and 19, please bear in mind there are a lot of tiles at these levels, and it may take a while to download from the Internet as well as take up more space on the USB drive.
Even from levels 7 to 17 it will take a while, so please be patient. If you need to cancel you can press escape, however it will save the tiles to your Maperitive/Tiles folder as it goes.
Putting the mapping tiles onto the Gateway
Using the Creating a USB drive for the Gateway FAQ, prepare a USB drive.
As soon as you create the “www” folder, inside create a folder named “tiles” ensuring both folders are all in lower case.
In this folder copy and paste all of the folders from 1 to 17. You can ignore the “tiles.json” file.
Insert the USB drive into the Gateway, and you now have offline mapping to be used with web applications such as the Livetrack Web Application.