Technique used/work done

Izquierdo et al., 2008

used the Spanish cadastre plug-in for Google EarthTM to segregate building roof areas

Hofierka, 2009

created a 3-D city model using digital orthophoto and digital elevation data of Bardejov city in eastern Slovakia with a spatial resolution of 1m

Wiginton, 2010

applied a ArcGIS extension named “Feature Analyst” on high resolution orthophotos of Ontario, Canada

Vardimon, 2011

used buildings’ polygon obtained through digitization of orthophotoes of Israel

Ramachnadra et al., 2014

estimated rooftop solar photovoltaic potential of Uttara Kannada, India, by digitizing rooftop area of a household in selected villages