If you own a mapping GPS unit, feel free to checkout
www.quik.clara.co.uk/maps, for an example of the sort of topo map you
can construct (for free!) from NASA data (as described elsewhere). IMO
it works well enough to be useful, given that the OS & Garmin continue
to conspire to not offer any topo maps for the UK (and will probably
overcharge when they do).
Actually there are two bits of map at that location .. a topo map (from
SRTM data) of all of Shropshire (and Telford/Wrekin) which is
transparent, and can be used as an overlay with whatever other maps you
happen to have loaded for the area (warning - the Garmin basemap is only
accurate to the nearest half Km or so!). That's 10000014.img.
10000013.img is a road/footpath/rivers/POI etc. map for just the
southern part of the county (and with footpaths and stiles and gates and
obstructions shown for just a small fraction of that area). Read the
warning though .. some of the data is derived from 1947 OS mapping, and
is likely to be wildly out of date (and not totally accurate to start
with), and the contours are probably only good to +/- 50m or so, given
that the SRTM data is on a fairly coarse grid outside the USA. Road and
path ('trail'😉 data will get better when I've collected tracklogs for
more of it, and updated the map.
--
GSV Three Minds in a Can
Outgoing Msgs are Turing Tested,and indistinguishable from human typing.