Solar cadastre

Urban-scale solar surveys

Solar cadastre

Several local authorities are currently creating 3D models of their land. Using the algorithms developed for the ARCHELIOS® software, we can produce a large-scale model of the amount of sun irradiation to which building walls and roofs are exposed.

This model can be used to generate a solar cadastre, which can then be incorporated into the local authority’s geographic information system (GIS) and/or uploaded to its website.

Determining the solar energy potential: global contribution, potential contribution for façade doors, windows, etc.

Detecting « sunless » zones

Smart grid: calculation of the electricity use covered by the potential PV energy and improved performance through storage (buildings or hubs)

Technical aspects of the solar cadastre

Solar cadastre takes account of roof and wall orientation and pitch. Calculations are based on the algorithms in the ARCHELIOS® software.

Solar cadastre automatically factors in the shade caused by the terrain, known as the horizon line (hills, mountains, etc.), based on topographical data from NASA.


Solar cadastre also takes account of the near shading (other buildings) based on a 3D model.

Examples of solar cadastre

  • 33
    Type of mission: Solar cadastre
    Energy: Solar photovoltaic and thermal
    Customer: City of Lyon
    Country: France
    Description: Mapping of the solar energy potential of 10,000 roofs
  • Cadastre solaire Bordeaux
    Type of mission: Solar cadastre
    Energy: Solar
    Customer: City of Bordeaux
    Partners: Geomap-Imagis
    Country: France
    Description: City-wide solar cadastre (in progress)
  • Cadastre solaire Annecy
    Link on the Geoportal
    Type of mission:
    Solar cadastre
    Energy: Solar
    Customer: City of Annecy
    Partners: Geomap-Imagis & LesENR
    Country: France
    Description: City-wide solar cadastre + green roof cadastral map
  • 34
    Type of mission: Solar cadastre
    Energy: Solar photovoltaic and thermal
    Customer: Plaine Commune municipal association
    Country: France
    Description: Solar Cadastre - Ile St Denis eco-district
  • 78
    Type of mission: Solar mapping
    Energy: Solar hybrid
    Customer: Confidential
    Country: World
    Description: Global map of hybrid PV systems (combined with generators), with or without storage
  • 38
    Type of mission: Solar mapping
    Energy: Solar
    Customer: INES-CEA
    Country: World
    Description: Global maps for comparing PV - CSP - CPV technologies
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