If you want maps for your Garmin GPSr and don’t want to use Topo GB then you could use the FREE ones from OpenStreetMap [http://www.openstreetmap.org/].
The map files offered here are compiled from the mapping data at OpenStreetMap. The license for the OSM map data is FREE, here is some data from the OpenStreetMap site:
“OpenStreetMap creates and provides free geographic data such as street maps to anyone who wants them. The project was started because most maps you think of as free actually have legal or technical restrictions on their use, holding back people from using them in creative, productive, or unexpected ways.”
All of the map files offered here are based on data from OpenStreetMap and are licensed under the terms of the Creative Commons Attribution Share-Alike 2.0 license. If you use these files please make sure you attribute the OpenStreetMap community by including a link to www.openstreetmap.org [http://www.openstreetmap.org]. If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one. You can find out more about Creative Commons licenses here [http://creativecommons.org/licenses/by-sa/2.0/].
Have more question about the maps and data?
Here is a link to the Frequently Asked Questions [FAQ] page on the OpenStreetMap site: http://wiki.openstreetmap.org/index.php/FAQ
If you have any problems installing the map file or are unsure of how to do some of the steps then take a look at the FAQ here.
I compile and use these maps on my Garmin Oregon 550, Etrex Vista Hcx and Etrex 30 and have the whole of the British Isles with contour data. The only downside it that they are a work in progress and missing some footpaths/bridleways but for most of the British Isles the road data is complete and many paths/tracks are included. If you like them then you can help by mapping where you travel and upload your track logs for use by the community to help improve the maps.
CAVEAT: No mapping solution is perfect.
“By the very nature of the wiki-style process there is no guarantee of accuracy of any kind. Then again, few proprietary maps carry a guarantee of accuracy, either. In fact, some have artificially-introduced errors.”
To participate and help improve the maps you just need to go to http://www.openstreetmap.org; create an account, upload your tracks from your GPSr and then edit the maps. Help on how to do this can be found on the OpenStreetMap site.
The same goes for any routing issues you identify, fix them on the OpenStreetMap site and they will be included in the next mapset I compile.
I also offer a higher detailed map for sale (my TT HD Topo maps) that is ideal for off-road use, such as hiking, geocaching, mountain biking, etc. You can find screen shots of the different maps here.
The maps offered here are based on OSM map data and NASA contour data which are open-source; I combine them together and add other material to them. You can download and use them for FREE (Standard maps only). However, this does NOT mean you can sell them or cards with these maps on (or even resell them). You are welcome to use them at no cost for personal use only!
These are not OS maps, they do not use data from Ordnance Survey and the maps offered via this site are not affiliated in any way with them. The use of the terms OS and Landranger is for descriptive purposes only and fully acknowledges that these terms are owned by Ordnance Survey, the same applies to the use of Garmin and Discoverer .
The author accepts no responsibility for errors or omissions, or for any ill effects resulting from the use of any information, files or links contained in this document or any part of this site.