The data presented below represent the predicted number of people per ~100 m pixel as estimated using the random forest (RF) model as described in Stevens, et al. (2015). The following pages contain a description of the RF model and its covariates, their sources and any metadata collected for each covariate. The prediction weighting layer is used to dasymetrically redistribute the census counts and project counts to match estimated populations based on UN estimates for the final population maps provided by WorldPop.
These data are the population density values used to estimate the RF model used to create the prediction weighting layer you see above. Values represent population density as measured by people per hectare and calculated from population counts within each census unit. These values are used as the dependent variable during model estimation.
Folder: Census
File Name: adminpop.shp
Source: National Institute of Statistics of Rwanda, 2002
Description: These high spatial resolution census block data were attained through in-country partners for 2002.
Class: polygon
Derived Covariates:
area, buff, zones,
class : SpatialPolygonsDataFrame
features : 9192
extent : 373404, 600036, 9686066, 9884202 (xmin, xmax, ymin, ymax)
coord. ref. : NA
variables : 9
These output and figures outline the estimated RF model that is used to predict the population density weighting layer. The model is fitted to the population density values for the preceding census data using covariates aggregatedfrom the ancillary data sources summarized following the model diagnostics.
Call:
randomForest(x = x_data, y = y_data, ntree = popfit$ntree, mtry = popfit$mtry, nodesize = length(y_data)/1000, importance = TRUE, proximity = TRUE)
Type of random forest: regression
Number of trees: 500
No. of variables tried at each split: 12
Mean of squared residuals: 0.15
% Var explained: 74
Folder: Lights
File Name: DEFAULT: VIIRS 2012
Source: http://ngdc.noaa.gov/eog/viirs/download_viirs_ntl.html
Description: These 'Lights at Night' data were derived from imagery collected by the Suomi National Polar-orbiting Partnership (NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) sensor. Data were collected in 2012 on moonless nights and though background noise associated with fires, gas-flares, volcanoes or aurora have not been removed it represents the best-available data for night-time light production.
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 1981, 2269, 4494889, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 373303, 600203, 9686021, 9884121 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\Lights\Derived\lights.tif
names : lights
min values : -0.13
max values : 1293
Folder: Temp
File Name: DEFAULT: BIO1
Source: http://www.worldclim.org/current
Description: WorldClim/BioClim 1950-2000 mean annual precipitation (BIO12) and mean annual temperature (BIO1) estimates (Hijmans et al., 2005) were downloaded, mosaicked and subset to match the extent of our land cover data for the mapping of this region.
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 2194, 2477, 5434538, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 362703, 610403, 9675621, 9895021 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\Temp\Derived\temp.tif
names : temp
min values : 42
max values : 240
Folder: Precip
File Name: DEFAULT: BIO12
Source: http://www.worldclim.org/current
Description: WorldClim/BioClim 1950-2000 mean annual precipitation (BIO12) and mean annual temperature (BIO1) estimates (Hijmans et al., 2005) were downloaded, mosaicked and subset to match the extent of our land cover data for the mapping of this region.
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 2194, 2477, 5434538, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 362703, 610403, 9675621, 9895021 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\Precip\Derived\precip.tif
names : precip
min values : 850
max values : 2250
Folder: Roads
File Name: RWA_OSM_Roads.shp
Source: http://www.openstreetmap.org/
Description: These data were downloaded as part of a per-country package of OSM data layers made availalble as shapefiles through the http://www.BBBike.org/community.html website.
Class: linear
Derived Covariates:
cls, dst,
class : SpatialLinesDataFrame
features : 19549
extent : 365957, 595568, 9683158, 9890612 (xmin, xmax, ymin, ymax)
coord. ref. : NA
variables : 10
Folder: Rivers
File Name: RWA_OSM_Rivers.shp
Source: http://www.openstreetmap.org/
Description: These data were downloaded as part of a per-country package of OSM data layers made availalble as shapefiles through the http://www.BBBike.org/community.html website.
Class: linear
Derived Covariates:
cls, dst,
class : SpatialLinesDataFrame
features : 3655
extent : 369599, 599983, 9682307, 9884222 (xmin, xmax, ymin, ymax)
coord. ref. : NA
variables : 5
Folder: Populated
File Name: DEFAULT: Merged pop/builtupp, pop/builtupa, pop/mispopp
Source: National Geospatial-Intelligence Agency (NGA), http://geoengine.nga.mil/geospatial/SW_TOOLS/NIMAMUSE/webinter/rast_roam.html
Description: The VMAP0 data area downloaded as separate files, grouped roughly by continent, and merged into individual shapefiles for subsetting and further processing for population mapping efforts. These data were obtained directly from the original VMAP0 data sources provided by the NGA and pre-processed using Military Analyst in ArcGIS 10.0. Point data sources are buffered to 100 m and then all polygon data sources are merged to a single shapefile prior to processing.
Class: polygon
Derived Covariates:
cls, dst,
class : SpatialPolygonsDataFrame
features : 48
extent : 373251, 583779, 9687191, 9882684 (xmin, xmax, ymin, ymax)
coord. ref. : NA
variables : 13
Folder: Waterbodies
File Name: RWA_OSM_Waterbodies.shp
Source: http://www.openstreetmap.org/
Description: These data were downloaded as part of a per-country package of OSM data layers made availalble as shapefiles through the http://www.BBBike.org/community.html website.
Class: polygon
Derived Covariates:
cls, dst,
class : SpatialPolygonsDataFrame
features : 330
extent : 370455, 607860, 9677802, 9883294 (xmin, xmax, ymin, ymax)
coord. ref. : NA
variables : 4
Folder: Protected
File Name: DEFAULT: WDPAfgdb_Sept2012.gdb
Source: World Database on Protected Areas, Downloaded September, 2012, UNEP, http://www.wdpa.org, http://protectedplanet.net
Description: These data are compiled by UNEP and distributed via the Protected Planet website. All protected areas were downloaded regardless of International Union for Conservation of Nature (IUCN) or any other designation, so they include sanctuaries, national parks, game reserves, World Heritage Sites, etc.
Class: polygon
Derived Covariates:
cls, dst,
class : SpatialPolygonsDataFrame
features : 13
extent : 386303, 610036, 9677976, 9883761 (xmin, xmax, ymin, ymax)
coord. ref. : NA
variables : 26
Folder: Urban
File Name: DEFAULT: schneider-urban.shp
Source: Schneider, et al., United Nations
Description: These data were constructed from MODIS-derived imagery and provided to WorldPop researchers by Schneider, et al. as part of a global urban extents datasets.
Class: polygon
Derived Covariates:
cls, dst,
class : SpatialPolygonsDataFrame
features : 19
extent : 369599, 529450, 9711107, 9860799 (xmin, xmax, ymin, ymax)
coord. ref. : NA
variables : 2
Folder: Elevation
File Name: DEFAULT: Void-Filled DEM.gdb
Source: HydroSHEDS Void-Filled DEM (Lehnert, et al., 2006), http://hydrosheds.cr.usgs.gov/dataavail.php
Description: The HydroSHEDS data are the result of an effort to provide a globally consistent dataset consisting of NASA's Shuttle Radar Topography Mission (SRTM) data and have been processed, void-filled and corrected for use at large scales.
Class: raster
Derived Covariates:
, slope,
class : RasterBrick
dimensions : 2184, 2472, 5398848, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 363203, 610403, 9675921, 9894321 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\Elevation\Derived\elevation.tif
names : elevation
min values : 823
max values : 4479
Folder: Buildings
File Name: RWA_OSM_Buildings.shp
Source: http://www.openstreetmap.org/
Description: These data were downloaded as part of a per-country package of OSM data layers made availalble as shapefiles through the http://www.BBBike.org/community.html website.
Class: polygon
Derived Covariates:
cls, dst,
class : SpatialPolygonsDataFrame
features : 85197
extent : 372436, 593257, 9688067, 9884835 (xmin, xmax, ymin, ymax)
coord. ref. : NA
variables : 5
Folder: Residential
File Name: RWA_OSM_Residential.shp
Source: http://www.openstreetmap.org/
Description: These data were downloaded as part of a per-country package of OSM data layers made availalble as shapefiles through the http://www.BBBike.org/community.html website.
Class: polygon
Derived Covariates:
cls, dst,
class : SpatialPolygonsDataFrame
features : 953
extent : 369230, 595027, 9689271, 9870953 (xmin, xmax, ymin, ymax)
coord. ref. : NA
variables : 4
Folder: Villages
File Name: RWA_OSM_Villages.shp
Source: http://www.openstreetmap.org/
Description: These data were downloaded as part of a per-country package of OSM data layers made availalble as shapefiles through the http://www.BBBike.org/community.html website.
Class: polygon
Derived Covariates:
cls, dst,
class : SpatialPolygonsDataFrame
features : 164
extent : 438013, 594862, 9704044, 9813894 (xmin, xmax, ymin, ymax)
coord. ref. : NA
variables : 5
Folder: GHSL
File Name: RWA_GHSL_DTE.tif
Source: https://ec.europa.eu/jrc/en/scientific-tool/global-human-settlement-layer
Description: These data were provided at 38m under a cooperation agreement with the GHSL project under the ECJRC as the 2014 beta versions and were converted to binary datasets at 38m. Data shown is euclidean distance of a binary settlement layer.
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 1981, 2269, 4494889, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 373303, 600203, 9686021, 9884121 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\GHSL\Derived\ghsl.tif
names : ghsl
min values : -600
max values : 25147
Folder: FB
File Name: RWA_FB_DTE.tif
Source: Facebook data, provided by Tobias Tiecke. Based on house_finder_footprint_perc_mwi_v3
Description: Based on privately distributed housing locates from Facebook. A binary layer of built vs. non-built area
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 1983, 2270, 4501410, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 373303, 600303, 9685921, 9884221 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\FB\Derived\fb.tif
names : fb
min values : -361
max values : 21423
Folder: GUF
File Name: DTE_GUF+_RWA.tif
Source: http://www.dlr.de/eoc/en/desktopdefault.aspx/tabid-11725/20508_read-47944/
Description: Global Urban Footprint data was downloaded at 2.8 arc second from web portal and subset for Rwanda. Shown is euclidean distance to edge.
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 1981, 2269, 4494889, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 373303, 600203, 9686021, 9884121 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\GUF\Derived\guf.tif
names : guf
min values : -894
max values : 30319
Folder: R011dte
File Name: rwa_grid_100m_ccilc_dst011_2010.tif
Source: http://cci.esa.int/content/land-cover-data
Description: European Space Agencie's Climate Change Initiative Data Portal: Distance to outer Edge of distinct landcover type
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 1984, 2270, 4503680, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 372803, 599803, 9686121, 9884521 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\R011dte\Derived\R011dte.tif
names : R011dte
min values : -9.2
max values : 14
Folder: R040dte
File Name: rwa_grid_100m_ccilc_dst040_2010.tif
Source: http://cci.esa.int/content/land-cover-data
Description: European Space Agencie's Climate Change Initiative Data Portal: Distance to outer Edge of distinct landcover type
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 1984, 2270, 4503680, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 372803, 599803, 9686121, 9884521 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\R040dte\Derived\R040dte.tif
names : R040dte
min values : -4.6
max values : 14
Folder: R130dte
File Name: rwa_grid_100m_ccilc_dst130_2010.tif
Source: http://cci.esa.int/content/land-cover-data
Description: European Space Agencie's Climate Change Initiative Data Portal: Distance to outer Edge of distinct landcover type
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 1984, 2270, 4503680, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 372803, 599803, 9686121, 9884521 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\R130dte\Derived\R130dte.tif
names : R130dte
min values : -2.9
max values : 26
Folder: R140dte
File Name: rwa_grid_100m_ccilc_dst140_2010.tif
Source: http://cci.esa.int/content/land-cover-data
Description: European Space Agencie's Climate Change Initiative Data Portal: Distance to outer Edge of distinct landcover type
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 1984, 2270, 4503680, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 372803, 599803, 9686121, 9884521 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\R140dte\Derived\R140dte.tif
names : R140dte
min values : -0.38
max values : 41
Folder: R150dte
File Name: rwa_grid_100m_ccilc_dst150_2010.tif
Source: http://cci.esa.int/content/land-cover-data
Description: European Space Agencie's Climate Change Initiative Data Portal: Distance to outer Edge of distinct landcover type
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 1984, 2270, 4503680, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 372803, 599803, 9686121, 9884521 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\R150dte\Derived\R150dte.tif
names : R150dte
min values : -0.093
max values : 181
Folder: R160dte
File Name: rwa_grid_100m_ccilc_dst160_2010.tif
Source: http://cci.esa.int/content/land-cover-data
Description: European Space Agencie's Climate Change Initiative Data Portal: Distance to outer Edge of distinct landcover type
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 1984, 2270, 4503680, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 372803, 599803, 9686121, 9884521 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\R160dte\Derived\R160dte.tif
names : R160dte
min values : -3.4
max values : 37
Folder: R190dte
File Name: rwa_grid_100m_ccilc_dst190_2010.tif
Source: http://cci.esa.int/content/land-cover-data
Description: European Space Agencie's Climate Change Initiative Data Portal: Distance to outer Edge of distinct landcover type
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 1984, 2270, 4503680, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 372803, 599803, 9686121, 9884521 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\R190dte\Derived\R190dte.tif
names : R190dte
min values : -1
max values : 36
Folder: R200dte
File Name: rwa_grid_100m_ccilc_dst200_2010.tif
Source: http://cci.esa.int/content/land-cover-data
Description: European Space Agencie's Climate Change Initiative Data Portal: Distance to outer Edge of distinct landcover type
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 1984, 2270, 4503680, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 372803, 599803, 9686121, 9884521 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\R200dte\Derived\R200dte.tif
names : R200dte
min values : -0.093
max values : 165
Folder: R210dte
File Name: rwa_grid_100m_ccilc_dst210_2010.tif
Source: http://cci.esa.int/content/land-cover-data
Description: European Space Agencie's Climate Change Initiative Data Portal: Distance to outer Edge of distinct landcover type
Class: raster
Derived Covariates:
,
class : RasterBrick
dimensions : 1982, 2273, 4505086, 1 (nrow, ncol, ncell, nlayers)
resolution : 100, 100 (x, y)
extent : 373103, 600403, 9685921, 9884121 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=tmerc +lat_0=0 +lon_0=30 +k=0.9996 +x_0=500000 +y_0=10000000 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : D:\WorldPop\data\RWA\R210dte\Derived\R210dte.tif
names : R210dte
min values : -8516
max values : 71816
