Today about 50% of the world’s population lives in cities. In Europe this proportion is higher than the global average: 72% of Europeans live in urban regions. Big cities and their residents are responsible for 75% of global energy consumption and for 80% of human-induced greenhouse gas emissions. Urban areas are highly affected by climate change and emissions such as carbon dioxide, nitrogen and respirable dust. Cities and their inhabitants must therefore play a key role in the fight against climate change.
Municipal Department 41 – Surveyors (MA 41) showed the potential of renewable energy using existing spatial data such as the Digital Surface Model (DSM). MA 41 also developed an application for all Viennese inhabitants indicating roof areas which allow an economic utilisation of the existing solar radiation with photovoltaic or solar heat technology. At the beginning of 2007, the relatively new technology of full waveform airborne laser scanning was used to capture the entire area of the City of Vienna. A laser scanner on a plane registered billions of points in the area of Vienna that cover about 415km². With an average of around 15 points per m², and a very high data quality regarding horizontal and vertical positions, this data represents a unique data record for further investigations. The spatial data provides an ideal basis for a location study of photovoltaic and solar heat.
Based on a feasibility study produced in 2009, the Executive City Councillor for the Environment and the Executive City Councillor for Urban Planning, Traffic & Transport, Climate Protection, Energy and Public Participation decided to commission an area-wide analysis of the solar radiation potential of Vienna’s roof surfaces in May 2010. Based on DSM and other spatial data such as the Digital Terrain Model (DTM) and the Multipurpose Map of Vienna (MZK), Laserdata Gmbh, a company situated in Innsbruck, computed the area-wide solar potential analysis of Vienna’s surface. In September 2010 the results of this analysis were visually presented to all inhabitants in the Internet application ‘Umweltgut’ (environmental assets). In the course of planning photovoltaic or solar heat equipment it is now possible to consider three important aspects of every roof: A spatial query shows information about the size of the roof; The size of medium recommended and; Highly recommended areas for the use of solar radiation.
The application is a joint project of Municipal Department 22 – Environmental Protection and Municipal Department 41 – Surveyors (MA 41). The location study of solar sites is one component in the context of the potential of renewable energy. More location studies, with respect to different renewable energy sources such as geothermal energy, wind power and biomass, should follow and result in an energy map considering all types of renewables. This could lead to a master plan for the potential of renewables and further contribute to increasing the use of sustainable energy sources.
|Award category:||going green|
|Sector:||Environment, climate change, agriculture (incl. food safety) and fishery|
|Type of activity:|
|Keywords:||Solarpotentialkataster Wien, Vienna, solar radiation, photovoltaic, solar heat, renewable energy, climate change|
|Short English description:||The location study of solar sites is one component in the context of the potential of renewable energy.|
|Organisation:||Municipal Department 41 – Surveyors|
|Level of government:||local level|
|Size of organisation:||>100|
|Number of people involved:||>15|
|EU membership:||EU member|