I happen to know a chap who has quite a lot of aerial imagery of Norfolk villages. Because he publishes the images, I cannot release the images to "the public" or to other mappers, but I can use them myself to generate mapping data.
Some of the uses I have in mind is to map landuse in villages and missing roads, for villages where most of the roads have already been gps-mapped, giving lots of known points to perform the rectification from. Now, the images are taken at quite a low angle, so I'll need to recify them using software, ideally some sort of orthorecification thing in JOSM, if such is availiable. The tranform will be a basic trapezoid shape, but with a bottom probably half as long as the top (so the image taken at 45 degrees) possibly with slightly bowed sides for any barrel distorion in the lens. Obviously this will only work from items on the flat plane, but handily that pretty much describes norfolk. Does anyone have experience of this, who could point me in the direction of the appropriate JOSM plugin, or external software? I have Linux (Gentoo) and Windows XP on systems used for mapping. This must be a fairly common issue for mappers, right? Tristan Scott BSc(Hons) Yare Valley Technical Services 07837 205829 01603 858441 _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk