WorldPop: Disaggregating areal population count data for demographic mapping using Random Forests with remotely-sensed and other ancillary data
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چکیده
2.1 Data Description Population distribution is often highly correlated with land cover types and we incorporate land cover information using the finest resolution contemporary ground-validated dataset available for each country. Land cover data are complemented by digital elevation data and its derived slope estimates, primarily from the SRTM-based HydroSheds data (Lehner et al., 2006). We also include MODIS-derived, MOD17A3 estimates of net primary productivity (NPP) (Running et al., 2004) as well as observed lights at night, mosaicked from Suomi National Polar-orbiting Partnership (NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) data, standardized and provided as a global coverage (NOAA, 2012). Within-country climatic spatial variation is also incorporated, by using WorldClim/BioClim 1950-2000 mean annual precipitation (BIO12) and mean annual temperature (BIO1) estimates (Hijmans et al., 2005).
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