Hello all, I never use the highest zoom level Bing imagery as it's rarely sharp enough to be useful. I have found Bing to give better resolution and alignment than OS OpenData StreetView (OSSV) in most places I work on (mostly West Yorkshire).
Bing also tends to agree more precisely with the NaPTAN imported bus stops on my 'patch'. If I trace the centre of a road on Bing, any bus stops will be equal distances from that trace, i.e. where the actual stops are. I'm not sure how the locations of stops are measured in NaPTAN but I guess they would be measured more accurately than consumer GPS or aerial survey. cheers, Ben On 21 October 2012 22:42, Jason Cunningham <jamicu...@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 > > > > _______________________________________________ > Talk-GB mailing list > Talk-GB@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-gb > _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
