1. http://landartgenerator.org/blagi/archives/127.
2. http://www.eia.gov/maps/layer_info-m.php.
3. Renewables Ninja - modelling wind and solar output across the globe.
4. Google’s Project Sunroof, “Tells you how suitable your roof is for solar power”.
5. Book, ”Machine learning for wind turbine site suitability in Iowa”.