Map population distributionPopulation distribution mapping using EO data is very useful, particularly for fast-growing or developing countries, where urbanisation creates rapid significant changes in the geographical distribution of population. Population distribution and density are based on the spatial disaggregation of census data using EO-derived lnd cover information. When collected at various administrative levels, census data is often too coarse for direct analysis, but additional information inside each administrative division can be obtained by studying the spatial distribution of land cover types inside each division. Knowing the type of urban fabric (residential or nonresidential) allows for more accurate spatial distribution of information and provides population estimates, for example, at night-time (home) periods, and, provided additional information is available, also for daytime (work) periods. Other EO contributions to population mapping consist in the estimation of the population in informal settlements (e.g. refugee camps) by measuring their spatial extent in very highresolution imagery. The spatial resolution, frequency and availability of the final products are directly linked to that of the input satellite products. Disaggregation using land cover information can be performed at various scales, from medium- to very highresolution. |