Since I purchased our Garmin GPSr I have always relied on the Garmin Great Britain TOPO maps to “show us the way”. This however, isn’t the only option for maps on our handheld GPSr’s. There is a free option – Open Street Map.
Garmins come with a worldwide basemap installed. It’s not very exciting though. Some sea, land, a few roads and rivers, etc. To start seeing contours, minor roads, footpaths and more detailed terrains then you need something else. There are a few options for UK cachers…
There are the Garmin TOPO Great Britain maps. These show countours, roads, rivers, POI’s trig points, and some tracks and paths. They retail at £150. We’ve used these for about a year, and despite Garmin stating the data is provided by the Ordnance Survey not all footpaths are included, and in some cases there are footpaths included that we have walked over to only to be confronted by a gate that says “PRIVATE” on it. The maps are OK. I can’t say they are great.