[ImNotJohn & Bigsmith] Blimey. We used to use the old red cover jobs when I was doing it, though admitedly I was less than serious about orienteering and probably just ran with an amateur crowd. I had no idea there was a 1:25 000 series of maps available commercially. Do they cover the entire UK? The only 1:50 000 OS map I can reliably put my hand on today would be "Land's End and The Lizard", and I can't for the life of me remember why I bought that one. I used a couple of Welsh ones until they fell apart but Land's End? When did I go there? It has some touristy annotations on it, like scenic photography overlooks and so forth, which my Welsh ones didn't. I suspect it was a detail added halfway through the print run or something. [Rosie] That's a nice legacy you have. I didn't remember that the 1 Inch to 1 Mile series had a metric grid. I do remember that we were taught to read an OS map in Geography class when I was around 11 or 12. That's when I fell in love with the things.
[SM] It's the wonder of satellite technology. Effectively the whole country has been remapped (at least as far as contours are concerned) in a matter of a couple of years whereas before there was a large team of cartographers doing physical surveys. This has got rid of some of the more obvious mistakes that used to exist, although there are still paths shown going over cliff edges in a couple of places that I know. For orienteering we normally start with a base plot (usually from the OS) with contour intervals down to 2.5 metres where appropriate (5m for very steep ground). There is then a specialised package (OCAD - there were others but this has come out on top) which has all the correct colours and symbols built in and you can build the map from that. There is still a need for fieldwork, but the whole thing is much slicker and maps get changed up to about 2 weeks before an event. Also with cheap high-quality printing most events now have the courses pre-printed - no need to copy from a master, and you can even run off more copies while the event is taking place if you get more than expected on one course. With electronic punching you get a print-out of your final and split times as soon as you finish and results from an event are on the web the same day. Up to about 10 years ago you left an SAE at the event and got the results about 1-2 weeks later.
For mountain walking I like Harvey Maps. They are at 1:40000, often photo-enlarged to 1:25000. They aren't as good in farmland as they don't show field boundaries, but they do show what is actually on the ground - there are different symbols for a right of way which is visible and one which is not visible as well as another for a visible path which is not a r.o.w.. They also change the colour of the contours to show rocky or marshy ground.
This weekend I will continue recovering. I like maps but do not own many (only one proper map, really), mainly because we don't have much landscape over here. Or perhaps we have far too much of it. In any case, [INJ] I feel remarkably uneasy when I am in an unfamiliar place without a map, and I really need to know where North is. Changing hemispheres is very disturbing. I came very close to mapping our parts of Oman, at least as far as roads and such things go, because they (maps) either did not exist or were wildly inaccurate. But the cost of GPSrs was too high. I now have a nifty little one, and have been enjoying the occasional geocache, thanks to my sister and brother-in-law's introduction. It definitely helps break up long drives, and is a fun way to explore new places. I haven't done orienteering in at least 20 years.