[Talk-us] [Imports] Kern County Import Cleanup

Alan Mintz Alan_Mintz+OSM at Earthlink.Net
Sun Jul 29 11:23:45 BST 2012


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 <Alan_Mintz+OSM at Earthlink.net>




More information about the Talk-us mailing list