Because I wanted to know, and as an exercise in OpenOverLayerIng, I have produced a map combining the extent of Yahoo aerial imagery coverage in GB with an overlay of the significant places calculated to be in most need of mapwork (from UK_Map_Priorities). You can see result at http://dev.openstreetmap.org/~steve8/yahoo.html Interesting that St Helens should be on list and also within Y! coverage, but it looks to me that someone has done a lot of work there since the calculations (in December I think it was). Also good that mapping parties are starting to be arranged for these places (M Keynes and Sunderland already - Grimsby anyone? [zoom in on mapnik layer for full effect]). Cheers STEVE
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