From now on, the citizens of the city of Bremerhaven on its own website can view the solar potential of their information on house roofs. Among the 45,000 surveyed buildings can gradations of solar output level directly be detected by using color, how the individual roof photovoltaic system or solar water heating are suitable for one. The individual calculations for the solar land were completed by Dorothy Ludwig and her team. Based on laser scanner data, which in 2008 were taken by aircraft, were shape, orientation, and shading from roofs determined inclination. This was complemented by a sound technical criteria computer. For more information on the calculation basis can be found here .