Re: [Talk-GB] mapping tunnels
On 28 Sep 2007, at 00:02, Andy Robinson wrote: Thom Shannon wrote: Sent: 27 September 2007 11:19 PM To: talk-gb@openstreetmap.org Subject: [Talk-GB] mapping tunnels Does anyone have any suggestions how to map a long tunnel? I know how to snip Do you think I could figure out some reasonable positions using a cars odometer and a compass? Or does it not really matter that much? Another option just occurred, the tunnel was started in 1925, so any maps from that era would be out of copyright. Perhaps a trip to the library? snip A trip to the Library may indeed be a sound idea. Or of course a trip to npemap.org.uk might help: http://www.npemap.org.uk/tiles/map.html#333,390,1 Though looking at it, it's probably not too much use. When I mapped Kingsway I basically did a straight line between the points where the GPS traces stopped, fortunately the GPS worked pretty well even in the cutting, and Kingsway doesn't have any junctions. You're probably fine using guesswork really, you should be able to do the main straight part quite easily, and then the extra exits might be a little flakey, but that's fine until better data is available. I basically had to use a combination of guesswork and looking at the aerial imagery when doing the (Liverpool) Northern line between Brunswick and Central because it's mainly tunnels and the line wasn't built when the NPE maps were made! John ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk-gb
Re: [Talk-GB] mapping tunnels
Bruce Cowan wrote: I remember people saying Wii controllers could be used when this subject came up a few months ago. someone mentioned that before, they're only quite simple accelerometers though, they wouldn't stand a chance of tracking someone driving in a car through a gently winding tunnel. ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk-gb
[Talk-GB] Natural:Cave
Hello, A few weeks/months ago i proposed a new mapping feature. A cave. Can anybody tell me how I can get this feature implemented into the map? The feature has been discussed, and approved, and an icon has been drawn. More information: http://www.archive.org/details/Sotm2007SurveyingCaves http://wiki.openstreetmap.org/index.php/Proposed_features/Cave Warm Regards, James Olney (WebJames) -- Tel: 00447809457487 Email: [EMAIL PROTECTED] www: http://www.happyjames.co.uk ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk-gb
Re: [Talk-GB] mapping tunnels
On Fri, 2007-09-28 at 15:10 +0100, Robert (Jamie) Munro wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Thom Shannon wrote: actually ASN looks a bit smarter than that. Here's another crazy idea. Use a video camera close to the road (I have a bullet cam that can be mounted on a car) then pattern match the images to track motion (like an optical mouse does) then combine that with a trace from a digital compass. Then by taking gps readings at either end of the tunnel you can calibrate those traces to counter cumulative error. You should then be able to get a really accurate trace. You might be better off using a ordinary forwards facing camera, and match-mover software (like boujou) that the use in movie effects to work out the camera movement and add virtual elements. There seems to be a free match-mover (camera tracker) package at http://digilab.uni-hannover.de/docs/manual.html that's probably worth a try. Jamie I remember people saying Wii controllers could be used when this subject came up a few months ago. -- Bruce Cowan [EMAIL PROTECTED] ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk-gb
Re: [Talk-GB] mapping tunnels
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Thom Shannon wrote: actually ASN looks a bit smarter than that. Here's another crazy idea. Use a video camera close to the road (I have a bullet cam that can be mounted on a car) then pattern match the images to track motion (like an optical mouse does) then combine that with a trace from a digital compass. Then by taking gps readings at either end of the tunnel you can calibrate those traces to counter cumulative error. You should then be able to get a really accurate trace. You might be better off using a ordinary forwards facing camera, and match-mover software (like boujou) that the use in movie effects to work out the camera movement and add virtual elements. There seems to be a free match-mover (camera tracker) package at http://digilab.uni-hannover.de/docs/manual.html that's probably worth a try. Jamie -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.6 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFG/Qthz+aYVHdncI0RAte7AJwKY5HNHr2zLyzQZwkPPJxvcMbPdgCfevQY Fmfqhoy3cOEb+QY6c6QhkE4= =KFvH -END PGP SIGNATURE- ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk-gb
[Talk-GB] OSM promotion?
Just because it's Friday afternoon...how's this for promoting OSM? http://www.smh.com.au/articles/2007/09/26/1190486383006.html Regards, Dave ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk-gb
[Talk-GB] Contour data
Hi, Can someone tell me how to either get data from free-map.org.uk, with contour lines, or add contour lines to OSM data? I'd like to use OSM data to print some maps suitable for walkers. I want to prove to my father-in-law that OSM is useful to him as a walker ;-) Russ ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk-gb
Re: [Talk-GB] mapping tunnels
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Robert (Jamie) Munro wrote: Thom Shannon wrote: actually ASN looks a bit smarter than that. Here's another crazy idea. Use a video camera close to the road (I have a bullet cam that can be mounted on a car) then pattern match the images to track motion (like an optical mouse does) then combine that with a trace from a digital compass. Then by taking gps readings at either end of the tunnel you can calibrate those traces to counter cumulative error. You should then be able to get a really accurate trace. You might be better off using a ordinary forwards facing camera, and match-mover software (like boujou) that the use in movie effects to work out the camera movement and add virtual elements. There seems to be a free match-mover (camera tracker) package at http://digilab.uni-hannover.de/docs/manual.html that's probably worth a try. Sorry, that should be http://www.digilab.uni-hannover.de/docs/manual.html -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.6 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFG/XSGz+aYVHdncI0RAu+9AKDQIT9jis8rWIbRbHFSJLJjBlbb5ACgmSbv 9ugtTPGiS5tQPjByX6m3hPY= =QN6N -END PGP SIGNATURE- ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk-gb
