[Talk-GB] Lake District Satellite Imagery

[woollac at hotmail.com]

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 <jamicuosm at googlemail.com> 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
>
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