On Tue, 10 Sep 2013 09:29:24 +0100, Lester Caine <[email protected]> wrote: >> One reason for this is parallax error, because the images aren't >> taken square on to the ground (that may be because the camera is >> taking in quite a large area. You can see this with building, you >> can end up with a metre or more difference depending on whether you >> use the top or bottom of the building. It also presumably means >> that alignment changes with the height of the land. > >Obviously this pass is well over from the last one, which was pretty >well aligned. There is quite a steep slope on the area I was working >on last night and I can align things to the bottom or the top of the >slope ... -1.68; -5.13 at the top >-6.92; -8.13 down the slop :) >
This has been discussed on the list before. Bing image alignment can be quite poor where there are steep elevation changes. I see this a lot around the Devon coast where a lot of the settlements are on steep slopes. Google seem to handle this a lot better. Whether they spend more capturing the imagery or have some better way of post processing it who knows? Kevin _______________________________________________ Talk-GB mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-gb
