Flickr and the Yahoo maps

The Flickr support for tagging photographs with location information via a map is nicely integrated into their ‘organizer’ application, but the maps used (from parent company Yahoo) are lacking in detail.

As an example, I wanted to tag my pictures of the second LoSUG meeting - I know that they were taken on King William Street in London, but the Flickr map I get is around 2cm to 1km resolution - it’s no use for actually placing the pictures properly.

Any alternatives that provide better resolution?