PVGIS (Joint Research Center – European Commission)
http://re.jrc.ec.europa.eu/pvgis/apps/radmonth.php
Visor SigPac (Geographic Information System of the PAC)
http://sigpac.mapa.es/fega/visor/
Google Earth:
http://earth.google.es/download-earth.html
CIEMAT (Energy, Environmental and Technological Research Centre)
http://www.ciemat.es/
CENER (National Renewable Energy Centre)
http://www.cener.com/
IDAE (Institute for Saving and Diversifying Energy)
http://www.idae.es/
CNE (National Energy Commission)
http://www.cne.es
ENERCLUB (Spanish Energy Club)
http://www.enerclub.es/
CSIC (Higher Board of Scientific Research)
http://www.csic.es/
Energy Foundation of the Madrid District Council
http://www.fenercom.com
Ministry of Industry, Tourism and Commerce
http://www.mityc.es/
IEA (International Energy Agency)
http://www.iea.org/
EPIA (European Photovoltaic Industry Association)
http://www.epia.org/