Table 1 Input datasets.
Data | Spatial resolution | Values | Projection | Geographic extent | Temporal reference | Format | Source |
|---|---|---|---|---|---|---|---|
GHS settlement grid, following the REGIO model 2014 in application to GHSL Landsat and CIESIN GPW v4-multitemporal (1975-1990-2000-2015) | 1 km | Pixel values represent the type of settlement | World Mollweide (EPSG:54009) | Global | 2015 | GeoTIFF | http://data.jrc.ec.europa.eu/dataset/jrc-ghsl-ghs_smod_pop_globe_r2016a |
GHS population grid, derived from GPW4, multitemporal (1975, 1990, 2000, 2015) | 30 arc seconds | Population counts | WGS84 (EPSG:4326) | Global | 2015 | GeoTIFF | http://data.europa.eu/89h/jrc-ghsl-ghs_pop_gpw4_globe_r2015a |
Friction surface | 30 arc seconds | Time required to cross each pixel in minutes per metre | WGS84 (EPSG:4326) | Global | 2015 | GeoTIFF | https://map.ox.ac.uk/wp-content/uploads/accessibility/friction_surface_2015_v1.0.zip |
Land mask based on Global Administrative Boundaries Dataset (GADM) v3.61 | 30 arc seconds | Binary mask of land/no land | WGS84 (EPSG:4326) | Global | NA | GeoTIFF |
