At 2012-07-29 01:04, Toby Murray wrote:
And then we end up with things that are off by 15-20 meters and look crappy: http://www.openstreetmap.org/?lat=34.95455&lon=-118.16858&zoom=16&layers=M
It looks like the landuses are shifted by about 28m at 126 degrees from Bing z19 dated 05/08/2010-08/31/2010, but I don't have a ref for the accuracy of Bing exactly there.
In this area: http://www.openstreetmap.org/?lat=35.04427&lon=-118.163429&zoom=18&layers=M south of Mojave airport, the landuses are shifted about 8m at 80 degrees. They also appear rotated very slightly - maybe -1 degree. This is relative to Bing z19 5/7/2010-06/21/2010. FAA runway coordinates at MHV show that the imagery is shifted less than 1m from reality. At the interface between the two sets of imagery (around 35.0024 lat), there is a shift of 0-2m between them. Also, my and other GPX tracks along SR-14 also suggest the imagery is accurate.
So, it's not clear why some of the landuses are shifted by so much, while others are not.
-- Alan Mintz <[email protected]> _______________________________________________ Talk-us mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-us
