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population density
Gridded Population of the World: Future Estimates, for the year 2010
Data produced by Center for International Earth Science Information Network (CIESIN), Columbia University.
These data were downloaded from http://sedac.ciesin.columbia.edu/gpw on October 19, 2011
SUGGESTED CITATION
Center for International Earth Science Information Network (CIESIN), Columbia University; United Nations Food and Agriculture Programme (FAO); and Centro Internacional de Agricultura Tropical (CIAT). 2005. Gridded Population of the World: Future Estimates (GPWFE). Palisades, NY: Socioeconomic Data and Applications Center (SEDAC), Columbia University. Available at http://sedac.ciesin.columbia.edu/gpw. (date of download).
ARCHIVE CONTENTS, file name: glp10ag.asc
This archive contains the UN-adjusted population counts in ASCII format for the year 2010.
The raster data are at 2.5 arc-minutes resolution. This archive contains the following grid(s):
p10ag population counts in 2010, adjusted to match UN totals
The ASCII format stores the data as simple text. The first lines of the file give the resolution, number of rows and columns, no data value, and rotation factors.
USE CONSTRAINTS
The Trustees of Columbia University in the City of New York, United Nations Food and Agriculture Programme (FAO), and the Centro Internacional de Agricultura Tropical (CIAT) hold the copyright of this dataset. Users are prohibited from any commercial, non-free resale, or redistribution without explicit written permission from CIESIN, FAO or CIAT. Users should acknowledge CIESIN, FAO and CIAT as the source used in the creation of any reports, publications, new data sets, derived products, or services resulting from the use of this data set. CIESIN, FAO and CIAT also request reprints of any publications and notification of any redistributing efforts.
Scripts: extract_population.py - reads data and extracts population denisty values at each site. latitudes are flipped! Max value is 1.67e6. Missing values are set to -999.
stable night lights
Nighttime lights are from the DMSP-OLS stable lights of the world (V4) dataset detected by the Defense Meteorological Satellite Program (DMSP) Operational Linescan System (OLS). Image and data processing by NOAA's National Geophysical Data Center. DMSP data collected by US Air Force Weather Agency. The data depict lights from cities, towns, and other sites with persistent lighting, including gas flares. Ephemeral events, such as fires have been discarded. Then the background noise was identified and replaced with values of zero. Data values range from 1-63. Bright city lights saturate the sensor, thus there is little dynamic range in city areas. Areas with zero cloud-free observations are represented by the value 255.
Data source: http://ngdc.noaa.gov/eog/dmsp/downloadV4composites.html
The raw data are available as GeoTIFF image covering 75 N to 65 S latitude at ~1 km resolution (actually 0.925 km), i.e. a total of 726 million data points.