Re: [Talk-GB] A new Flickr group for old out-of-copyright OS Maps
On 13 Sep 2009, at 22:55, Thomas Wood wrote: > 2009/9/13 Peter Miller : >> >> On 13 Sep 2009, at 22:41, Thomas Wood wrote: >> >>> These maps are already rectified of course, it's usually good to >>> convert the OS coordinates to Lat/Lons and then set the grid corners >>> as reference points. >> >> But my photographs of the maps will have introduced some tilt and >> other >> distortions, so it does need some control points. Possibly you are >> saying >> that I can calculate the control points from the OS grid references >> for the >> corners. That may indeed be true. > > Yes, it is a shame that they're too large to be scanned at once, it'd > make for a much better image. You seem to have achieved fairly > reasonable results with a camera though. > I would consider getting them scanned, but I have no idea where or how much is costs and I had a camera to hand! I tripod would have helped, but I was keen to get on with it. The plan now is to give the maps to the local records office however I though I would investigate getting the scanned first - or possibly the records office has a suitable scanner. I do know that Steve Chilton has access to one, but then there is the problem of getting them there and there might also be a charge of course. Regards, Peter > -- > Regards, > Thomas Wood > (Edgemaster) ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] A new Flickr group for old out-of-copyright OS Maps
2009/9/13 Peter Miller : > > On 13 Sep 2009, at 22:41, Thomas Wood wrote: > >> These maps are already rectified of course, it's usually good to >> convert the OS coordinates to Lat/Lons and then set the grid corners >> as reference points. > > But my photographs of the maps will have introduced some tilt and other > distortions, so it does need some control points. Possibly you are saying > that I can calculate the control points from the OS grid references for the > corners. That may indeed be true. Yes, it is a shame that they're too large to be scanned at once, it'd make for a much better image. You seem to have achieved fairly reasonable results with a camera though. -- Regards, Thomas Wood (Edgemaster) ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] A new Flickr group for old out-of-copyright OS Maps
On 13 Sep 2009, at 22:41, Thomas Wood wrote: > These maps are already rectified of course, it's usually good to > convert the OS coordinates to Lat/Lons and then set the grid corners > as reference points. But my photographs of the maps will have introduced some tilt and other distortions, so it does need some control points. Possibly you are saying that I can calculate the control points from the OS grid references for the corners. That may indeed be true. > Quite a few sheets were done this way for Oxford. See > http://warper.geothings.net/layers/7 for an example of what's > possible. Very nice. Regards, Peter > > > 2009/9/13 Peter Miller : >> >> I was lent 65 first-edition 1:500 OS maps of Ipswich dating back to >> 1882 a couple of days ago which I have now photographed and uploaded >> to Flickr. I was surprised to find that there was no Flickr group of >> out-of-copyright OS maps so I created it. >> >> The rules I have created says that all maps should be geo-coded, that >> the photos should be released CCBYSA and that the contributor agrees >> that the images can also be used to derive mapping for OSM (to cover >> use under ODBL where there derivation from CCBYSA is less certain. >> >> The group is here: >> http://www.flickr.com/groups/1192...@n24/pool/ >> >> I have also just rectified one map using Warper. Four control points >> seemed to do the job very well. >> http://warper.geothings.net/maps/preview/1205 >> >> If anyone has any suggestions about adjusting the rules for the group >> or wants to be an admin then please let me know. >> >> >> >> Regards, >> >> >> >> Peter >> >> >> >> >> ___ >> Talk-GB mailing list >> Talk-GB@openstreetmap.org >> http://lists.openstreetmap.org/listinfo/talk-gb >> > > > > -- > Regards, > Thomas Wood > (Edgemaster) ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] A new Flickr group for old out-of-copyright OS Maps
These maps are already rectified of course, it's usually good to convert the OS coordinates to Lat/Lons and then set the grid corners as reference points. Quite a few sheets were done this way for Oxford. See http://warper.geothings.net/layers/7 for an example of what's possible. 2009/9/13 Peter Miller : > > I was lent 65 first-edition 1:500 OS maps of Ipswich dating back to > 1882 a couple of days ago which I have now photographed and uploaded > to Flickr. I was surprised to find that there was no Flickr group of > out-of-copyright OS maps so I created it. > > The rules I have created says that all maps should be geo-coded, that > the photos should be released CCBYSA and that the contributor agrees > that the images can also be used to derive mapping for OSM (to cover > use under ODBL where there derivation from CCBYSA is less certain. > > The group is here: > http://www.flickr.com/groups/1192...@n24/pool/ > > I have also just rectified one map using Warper. Four control points > seemed to do the job very well. > http://warper.geothings.net/maps/preview/1205 > > If anyone has any suggestions about adjusting the rules for the group > or wants to be an admin then please let me know. > > > > Regards, > > > > Peter > > > > > ___ > Talk-GB mailing list > Talk-GB@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-gb > -- Regards, Thomas Wood (Edgemaster) ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
[Talk-GB] A new Flickr group for old out-of-copyright OS Maps
I was lent 65 first-edition 1:500 OS maps of Ipswich dating back to 1882 a couple of days ago which I have now photographed and uploaded to Flickr. I was surprised to find that there was no Flickr group of out-of-copyright OS maps so I created it. The rules I have created says that all maps should be geo-coded, that the photos should be released CCBYSA and that the contributor agrees that the images can also be used to derive mapping for OSM (to cover use under ODBL where there derivation from CCBYSA is less certain. The group is here: http://www.flickr.com/groups/1192...@n24/pool/ I have also just rectified one map using Warper. Four control points seemed to do the job very well. http://warper.geothings.net/maps/preview/1205 If anyone has any suggestions about adjusting the rules for the group or wants to be an admin then please let me know. Regards, Peter ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
