What is a solar cadastre ?

The solar cadastre is a mapping of a territory that highlights the solar energy that reaches the roofs over an average year. Usually financed by a local authority, this mapping is made available to the public using geographic information systems (GIS), in order to learn about the solar potential of buildings, and thus to know the energy profitability and therefore economical to install a solar thermal or photovoltaic system.

Mark with different colors in order to represent several levels of sunshine, a solar cadastre can have several levels of precision and thus provide values: ✔ Per house ✔ By roof section ✔ Per m² and sometimes less

To obtain a solar cadastre, it is important to assemble several technical data such as: ✔ the amount of sunshine in the area to be studied ✔ meteorology ✔ near and far shadows. Without this assembly, the solar cadastre data would not be very reliable.