Eyes in the skies judge population size

摘要

The population of a city has been calculated using satellite data, This new method could target aid to disaster zones more rapidly and accurately. Croups like charity Medeclns & ins Frontieres (MSF) use the "quadraT method to estimate population size-surveyors sample areas to determine the number of buildings and how many people live in each type. From this, they estimate the population of the entire city.