Gridded Population of the World Version 3 (GPWv3): Population Density Grids.

SUGGESTED CITATION

Center for International Earth Science Information Network (CIESIN), Columbia 
University; and Centro Internacional de Agricultura Tropical (CIAT). 2005. 
Gridded Population of the World Version 3 (GPWv3): Population Density Grids. 
Palisades, NY: Socioeconomic Data and Applications Center (SEDAC), Columbia 
University. Available at http://sedac.ciesin.columbia.edu/gpw. (date of download).

ARCHIVE CONTENTS

The data contained in this archive are the final version of GPWv3, and
should be used instead of the previous (alpha, beta) versions.

This archive contains population densities, both UN-adjusted and unadjusted, 
in ArcInfo GRID format. The raster data are at 2.5 arc-minutes resolution and 
contain the following data:

ds00g	population densities in 2000, unadjusted, persons per square km
ds00ag	population densities in 2000, adjusted to match UN totals, persons per square km

All densities are in persons per square kilometer.

The ArcInfo GRID format is intended for use with software that can read this
ESRI format, such as ArcView or ArcMap with the Spatial Analyst extension, 
or other non-ESRI software that supports read (e.g., access through GDAL 
libraries). For other software packages ASCII and BIL formats are available
via http://sedac.ciesin.columbia.edu/gpw.

The data are stored in geographic coordinates of decimal degrees based 
on the World Geodetic System spheroid of 1984 (WGS84).

USE CONSTRAINTS:

The Trustees of Columbia University in the City of New York 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 or CIAT. Users should acknowledge 
CIESIN 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 and CIAT also request reprints of any publications and notification 
of any redistributing efforts.

DISTRIBUTION LIABILITY

CIESIN follows procedures designed to ensure that data disseminated by CIESIN 
are of reasonable quality. If, despite these procedures, users encounter apparent 
errors or misstatements in the data, they should contact SEDAC User Services at 
+1 845-365-8920 or via email at ciesin.info@ciesin.columbia.edu. Neither CIESIN nor 
NASA verifies or guarantees the accuracy, reliability, or completeness of any data 
provided. CIESIN provides this data without warranty of any kind whatsoever, either 
express or implied. CIESIN shall not be liable for incidental, consequential, or 
special damages arising out of the use of any data provided by CIESIN.

ACKNOWLEDGEMENTS

This work, including access to the data and technical assistance, is provided by 
CIESIN, with funding from the National Aeronautics and Space Administration under 
Contract NAS5-03117 for the Continued Operation of the Socioeconomic Data and 
Applications Center (SEDAC).