http://www.theatlanticcities.com/technology/2012/10/mapping-potential-solar-power-every-roof-city/3605/
21 Oct 2012: A few years ago, this Rushcliffe solar project started with the idea of solar mapping West Bridgford, and this was done, albeit, it is a large spreadsheet rather than a large photomap. But technology moves on, and it is possible to use laser survey methods combined with aerial photography to map the potential for solar power generation. This article using a site in Cambridge Massachusetts points to ways that we will use in future when fossil fuel becomes even more rare.