I bought a couple of maps from Dash4It last week (see Humphrey's post) and was very satisfied with the service. I am now going through all my Challenge area OS maps comparing the date of revision with the details given on the OS' webpage to see which ones of those I should replace while the price is good.

One thing that has always puzzled me is the "Edition". On my Challenge maps, these are all B, C or D and usually followed by a number. For example, my copy of 42 Glen Garry & Loch Rannoch is Edition B1, was revised for selected changes in 2002 and reprinted for minor changes in 2004. The current version is edition B2 and dated 31/10/2011 according to the OS webpage.

So does that mean there were no changes to that map between 2004 and 2011? Does a change of Edition number indicate that there have been significant revisions? Does the Edition change everytime the map is revised or reprinted?

I can't find any explanation on the OS webpage. Does anyone know what these B1, C3 etc numbers mean, please?

Judith,

If you go here www.fieldenmaps.info/articles/editions/ You may find your info.


Barry

And here's an excellent tool that lets you do a reverse search back from any location by:


Typing a British or Irish address, post code or place name in the location box;

or

Panning and zooming the key map.


Click here to go to the site

A great tool when filling out those route sheets!

Thanks, Barry. Yes, that's very informative. I had not realised that I also have to pay attention to the underlining underneath the (eg) C3 code, as that indicates the level of minor changes.

This also helps me better understand the OS website. I thought that an edition listed as "C2-" was a typo, but I now realise that the "-" indicates minor revisions to the C2 edition.

All fascinating stuff!