Sensors, empowerment, and accountability: a Digital Earth view from East Africa. - Yola Georgiadou; Benson Bana; Robert Becht; Robert Hoppe; Justinian Ikingura; Menno-Jan Kraak; Kate T. Lance; Rob Lemmens; Juma Hemed Lungo; Michael K. McCall; Gianluca Miscione; Jeroen Verplanke (Int. J. Digit. Earth, 2011)