[ImNotJohn] I wonder it's still called "orienteering" and hasn't made the jump to "orientationeering" in the twenty five years since I did any. I miss the old OS maps. I stopped using them about the time they completed the old red-cover One Inch To One Mile series and began redoing the job in pink-cover 1:50 000 metric maps (talk about make-work in government!). They must have done all of the UK in metric by now I would think. As a teen I salivated over the prospect of a complete collection of OS maps. I think I have six. I've often wished for the same types of maps with the same degree of coverage in the places I've lived since leaving the UK, but other countries missed that particular boat and are unlikely to go that route now we have "better" GPS systems. It was one of the nastier shocks to find that other western countries didn't have super-accurate maps for the asking. I had to use boat charts and forestry "blueprint" jobs for the most part. Joni Mitchell had it right.
Incidentally, it took me about five attempts to type your screen name without automatically inserting spaces (I tried Im Not John, ImNot John, Im NotJohn, then did some of them again before I got my brain to do it right). I've never had that happen before. Did you design for that effect?
I'm doing the world premiere of "What happened here - a retelling of Lear" tonite, and the second and final-for-us-but-hopefully-not-for-the-author show tomorrow nite. Sunday is a rest day :oD First Sunday without either rehearsal or show since nehwwonktnodi...
[Sierra Mike] I answer to INJ mostly. In fact elsewhere I tend to be just NotJohn - Im not sure why I've got the 'Im' in the Morniverse. I'm also a bit of a cartophile - I've got 2 shelves devoted to them at the moment. I have a version of the StevieruleTM which goes 'No Map no Trip'. OS maps now cover the whole of the UK at 1:25000 and are so much clearer than the 1:50000, which I use mostly for cycling. I still love the 1 inch tourist maps with the colouring & hachuring but you can't beat the large scale for navigating in mist/cloud. Also you get spoilt by the quality of orienteering maps 1:10000 or 1:15000 using specialised software, where you can navigate to the nearest 10 metres.
I have inherited dozens of OS maps from my cartophilic Dad, mostly 6th Edition but some older than that (pre-war). The expansion of some towns is phenomenal. Crawley, for example, was a compact place with a station and a high street but is now a vast, amorphous sprawl. The new 1:50,000 and 1:25,000 maps are more accurate and detailed than their older counterparts, particularly in regard of contours. There are sad (old meaning) bits such as "Course of old railway" and "Mines (disused)" (Yeah, so's mine). Even though the OS Grid has always been metric I'll never get used to heights in metres. My house is at 557 ft, not 169 metres, so I claim the title of Highest-living Morniverser. [Non-mappies look away NOW] The OS Grid is a Transverse Mercator projection, prime meridian 2°W, based on a model of the Earth developed by Sir George Airy over 100 years ago. It's a tiny bit different from modern values both in size and degree of flattening. There is a scale reduction of 0.04%, presumably to allow for the expansion of the scale in the projection away from the prime meridian.
[Rosie] I cannot claim such a lofty domicile, but two minutes' drive gently uphill takes me to this point, Cossham Hospital, the highest point in Bristol at 369 feet (112 meters). On a clear day the views over the city, the Severn Valley, Forest of Dean and even the Brecons are excellent. Oh, and thanks for the techie stuff!
[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.