Satmap Active 10 can be purchased wuth full UK 1:50,000 mapping. Need to shop around for the best price as it can vary alot. As a guide Uttings have one with maps for £315. 1:25,000 maps can also be purchased which are good but expensive
There is a SatMap for sale here on OM: clicky
I thought long and hard about this for over a year! I wrote off the MM 2800 as it had an in built battery and short battery life, I wrote off the MM 3500 due to the bad user reviews. Even though they appear value for money the short comings on both units de-valued the units IMO. I bought a satmap active 10 plus with full GB mapping in the end from Amazon - keep an eye on the price as when I bought it cost me £290.
Very happy with Satmap and would without doubt recommend it.
Having looked at the Definitive mapping for Hampshire (in order to check the current status of an apparently re-routed/obscured footpath, and report the problem, it occurred to me that it might be a good idea (and OpenData policy) for councils to publish PRoW data as GPX files. All PROWs are given an identifier, and these could be used to dfine the bounds of the GPX files.
These files could then be pulled in to mapping tools, and cut and pasted to come up with route plans that adhere to the latest definitive mapping.
The problem seems to be that the definitive map is Crown Copyright. Which, in my book, says 'public data'; gathered by public officials, paid for by the public.
It would be the obvious way to ensure that the published PROW data was bang up-to-date; the PROW data would be 'live', and updated as soon as revisions are made. It might be necessary to isolate the genuine definitive map data sets from the published GPX files, to protect them from malicious modification, but that should be covered by normal server protection measures.
If all we need is the PROW route data, that should be available independently of OS mapping.
BTW, Hampshire's PROW website is rather good. The Definitive map is available as PDF chunks.
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