5 July 2016 3640 x 2160 pixel

Drone DJI Phantom 3 P, taken beginning of July 2016, photo is a snapshot from a movie (DJI_0036.MOV)

from about 120 m altitude (max limit by DGAC); orthogonal shot with camera to ground, taken at PUC San Joaquin

nueva herramienta del Observatorio CEDEUS

Made with OpenJUMP by sstein. Road network data are from OpenStreetMap. The limits of Gran Santiago's urban area is from a dataset from the Biblioteca Nacional de Chile (BNC)

made with OpenJUMP and OpenStreetMap data by sstein

Vasconcellos, Eduardo A. (2001), Urban Transport, Environment and Equity - the case for developing countries, Earthscan, UK, table 2.1, página 12.