i always compare bing to the OS street view, and if the two match up then I take it that the alignment is correct. Bing giving me a finer detail, for the finishing touches.
Where i find bing is well out of alignment is in areas with deep Valleys or ranges of mountains, where it matches for a while and then gets distorted. Jason W (unieagle) Connected by Motorola Jason Cunningham <[email protected]> wrote: >In the areas of the UK where I use Bing there is the same situation. The >highest zoom level shows an old image. The newer imagery has better detail >than the old in most cases, but you can't be confident that it is better >aligned. In an area I've been working on the old imagery was better >aligned. Things can be complicated because the error within the Bing >imagery can change over a few hundred meters. The same issue applies for >the GPS traces where the error while change over time > >Another background source is the OS Opendata Streetview map. I treat this >background as the most reliable 'imagery' source for road alignment. As I >know the Bing imagery is commonly badly misaligned in the areas I map, I'll >shift the Bing imagery to align with the OS Opendata Streetview map. I can >then use my gpx data as another source of data for paths taking note of >errors suggested by the Streetview map, and Bing imagery. When you dealing >with several potential sources all of which can have an alignment error >your forced to make a judgement that will improve with experience. > >Jason > >_______________________________________________ >Talk-GB mailing list >[email protected] >http://lists.openstreetmap.org/listinfo/talk-gb
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