This appendix lists the data sources used to estimate the population figures in the GIS database and other relevant information pertaining to the demographic estimates and GIS datasets. Population data for 1990 and 2000 were provided by CIESIN. Population data for 1960, 1970, and 1980 were estimated by Andy Nelson, using UN country totals for those years and the existing population estimates by Uwe Deichmann.
This version of the population database contains improvements in spatial and population data for specific countries, but still relies heavily on the previous version, especially for spatial data which is referred to as "UNEP/GRID-WRI-NCGIA Africa Population Database, https://na.unep.net/" in the following documentation.
The previous version of this meta-database used data for the nineteen West African countries that were estimated by Benoit Ninnin for the West Africa Long Term Perspective Study (WALTPS) carried out by the Club du Sahel/OECD (see Ninnin 1994). All other figures were calculated by Uwe Deichmann. Unless otherwise stated the administrative boundaries were the same as those in the African Data Sampler (WRI 1995) or in the WALTPS database (see Brunner et al. 1995).
| Spatial data | Population data | |
|---|---|---|
| Source | UNEP/GRID-WRI-NCGIA Africa Population Database, https://na.unep.net/ | (1) International Database, US Census Bureau, International Programs Center, digital file, undated. (2) Thompson, V. and R. Adloff (1968), Djibouti and the Horn of Africa, Stanford University Press, Stanford. (3) Estimates of 1979 population were found in Republique de Djibouti (1989), Annuaire Statistique de Djibouti, Direction Nationale de la Staistique; (4) Estimates of 1998 population were from Trésor de la Langue Française au Québec (TLFQ), http://www.tlfq.ulaval.ca. |
| Notes | Pop estimates were available only for the five districts/cercles (boundaries are available for 11 second level administrative units). |
| Spatial data | Population data | |
|---|---|---|
| Source | Omar Mohamed Hamza (Executive Manager, GIS Program), Cabinet Information and Decision Support Center (IDSC) of the Central Agency for Public Mobilaztion and Statistics (CAMPAS). Additional data support provided by Opinion Research Corporation (ORC) Macro International. | (1) 1996 Egyptian Census. Estimates of population in 1990 were based on the 1986 census, digital file, POPMAP application
produced by Egyptian Statistical Office in collaboration with the UN Software Development Project (UNSD/DESIPA) (2) Arab Republic of Egypt (1991), Statistical Yearbook of Egypt 1991, Central Agency for Mobilization and Statistics, Cairo. (3) Arab Republic of Egypt (1993), Statistical Yearbook of Egypt 1993, Central Agency for Mobilization and Statistics, Cairo. |
| Notes | Population figures were available for 1960, 66, 76, 86 and 92 (estimates). For 1960-76, the total national population and the share of the governates population of the national total were available. These were first converted to total numbers. P60-00 was then derived using average annual growth rates. |
| Spatial data | Population data | |
|---|---|---|
| Source | UNEP/GRID-WRI-NCGIA Africa Population Database, https://na.unep.net/ | (1) Republica de Guinea Ecuatorial (1981), Recensa Estadistica de Guinea Ecuatorial, Direccion General de Estadistica, Malabo.
[1965 data] (2) Republica de Guinea Ecuatorial (1983), Censos Nacionales de Poblacion y de Vivienda de 4 de Julio de 1983, Direccion General de Estadistica, Malabo. (3) Republica de Guinea Ecuatorial (1987), Guinea en Cifras 1987, Direccion General de Estadistica, Malabo. (4) Republica de Guinea Ecuatorial (1990), Boletin Estadistica Anual 1990, Direccion General de Estadistica, Malabo. |
| Notes | These figures do not allow us to pick up the decline in population between 1970 and 1980 from 291k and 217k and the subsequent increase to 312k in 1985. The estimates for 60-90 were therefore based on average annual subnational growth rates and uniformly adjusted to match the UN estimates for those years. |
| Spatial data | Population data | |
|---|---|---|
| Source | GIS coverage produced by USGS/EDC USAID/FEWS and obtained through the International Livestock Research Institute. UNEP/GRID-WRI-NCGIA Africa Population Database: https://na.unep.net/ | Estimates of population in 1990 were based on (1) the Census of Ethiopia 1984, Digital File obtained from EROS Data Center through the Int'l Livestock Research Institute; contains population figures for 3rd level administrative units (2nd level for Eritrea) (2) Central Statistical Authority (1986), Eritrea Statistical Abstract 1986, Addis Abeba. Contains population by first and second sub-national levels (Region and Awraja) for 1986. |
| Notes |
| Spatial data | Population data | |
|---|---|---|
| Source | Boundary data were provided by Patrick Gordon, Mine Information Advisor, UNDP Mine Action Advisory Team. | (1) Census of Ethiopia 1984, Digital File obtained from EROS Data Center through the Int'l Livestock Research Institute;
contains population figures for 3rd level administrative units. (2) Groupe de Demographie Africaine (1986), Population size in African countries, IDP-INEP-INSEE-MICOOP-ORSTOM, Paris contains region population figures for 1975. (3) Ofcansky, P. and B. LaVerle (1993), Ethiopia - A country study, Area Handbook Series, Federal Research Division of the Library of Congress. (4) 1994 data downloaded from the United Nations Development Programme Emergencies Unit for Ethiopia (UNDP-EUE) databases: http://www.sas.upenn.edu. |
| Notes | Komesha Wereda was manually split from Asosa Wereda based on the map from: http://www.telecom.net.et. | (1) Population for Dire Dawa Town was added to Gurgura Wereda as the town population from the census is within this unit; (2) Mekele Wereda was relabeled in the census data from Region 1, Zone 4, Wereda 9 to Region 1, Zone 5, Wereda 1 to match spatial data; (3) For the two regions that had no census data, population for the units was estimated based on input data used in GPW version 2 for the years 1984-86. Several units in these regions did not match spatially. The new and old units were intersected and population was allocated proportionally to the new areas. (4) 1994 population data were projected to the years 1990 and 2000 using growth rates derived from United Nations national level estimates and projections |
| Spatial data | Population data | |
|---|---|---|
| Source | UNEP/GRID-WRI-NCGIA Africa Population Database, https://na.unep.net/ | (1) Republique Gabonaise (1980), Annuaire Statistique du Gabon 1976-80, Direction Generale de la Statistique et des Etudes
Economiques, Ministere de la Planification de l'Economie et de l'Amenagement du Territoire, Libreville. (2) Republique Gabonaise (1990), Annuaire Statistique du Gabon 1990, Direction Generale de la Statistique et des Etudes Economiques, Ministere de la Planification de l'Economie et de l'Amenagement du Territoire, Libreville. (3) Republique Gabonaise (1993), Recensement Generale de la Population et de l'Habitat 1993, Resultats Preliminaires, Direction Generale de la Statistique et des Etudes Economiques, Ministere de la Planification de l'Economie et de l'Amenagement du Territoire, Libreville. |
| Notes | Subnational and national population figures for Gabon are very inconsistent. Instead of using the raw figures, the final estimates are based on the proportion of a sub-units population of the national total. These proportions were then applied to the UN estimates. Population data were projected to the year 2000 using growth rates derived from United Nations national level estimates and projections. |
| Spatial data | Population data | |
|---|---|---|
| Source | UNEP/GRID-WRI-NCGIA Africa Population Database, https://na.unep.net/ | (1) Population and Housing Census 1993, Banjul: Central Statistics Department. (2) Etude d'une Image à Long Terme de l'Afrique. (3) Central Statistics Department: Population Housing Census 1983: General Report, Vol. I: Administrative and Analytical Procedures. (4) Central Statistics Department: General Report: Banjul, October 1987. (5) CERPOD: Migrations and Urbanization in the Sahel, Gambia, Ndow A. and H. Njai, Rapport de recherche, Vol. III. (6) Lopez-Escartin N.: Données de base sur la population, Gambie: CEPED, No. 11, Paris, Décembre 1991. |
| Notes |
| Spatial data | Population data | |
|---|---|---|
| Source | 2000 spatial data were provided by David Rain of the US Census Bureau International Programs Center 1984 boundaries were initially produced for the UNEP/GRID-WRI-NCGIA Africa Population Database, https://na.unep.net/ |
2000 Population and Housing Census, Ghana. 1984 population estimates were based on these sources: (1) Republic of Ghana: Population Census of 1984, Preliminary Report: Accra, Decembre 1984 (2) Republic of Ghana: Population Census of 1984, Special report on localities by local authorities and by region, Statistical Service: Accra 1989. |
| Notes | Data were projected using artificially constructed regions. The data were aggregated to six regions and regional growth rates were subsequently applied to corresponding districts, to generate population estimates of 1960-1990 at a spatial resolution consistent with the year 2000 spatial units. |
| Spatial data | Population data | |
|---|---|---|
| Source | UNEP/GRID-WRI-NCGIA Africa Population Database, https://na.unep.net/ | 1996 population data from the African Census Analysis Project, http://www.acap.upenn.edu. The population figures for 1990 were based on estimates produced by Benoit Ninnin for the OECD/Club du Sahel West Africa Long Term Perspective Study (WALTPS) for 1960-90. He used these sources: (1) Etude d'une Image - Long Terme de l'Afrique. (2) Ministere du Plan et de la Cooperation Internationale (Direction Generale de la Statistique et de l'Informatique): Recensement general de la population et de l'habitat, Fevrier 1983, Resultats provisoires: Conakry, Octobre 1987, Analyse des resultats definitifs: Conakry, Decembre 1989. (3) enard J.L.: Projet de developpement urbain de Conakry, Avril 1988 |
| Notes | An extra settlement unit in the population data, named Conakry, was combined with the parent unit named Dubreka. | A population growth rate was calculated between 1990 and 1996 to extrapolate to year 2000. |
| Spatial data | Population data | |
|---|---|---|
| Source | UNEP/GRID-WRI-NCGIA Africa Population Database, https://na.unep.net/ | The population figures 1990 are based on the OECD/Club du Sahel West Africa Long Term Perspective Study (WALTPS), estimated by
Benoit Ninnin, and were based on (1) Republica da Guine-Bissau, Recenseamento Geral da Populacao e da habitacao, 16 de Abril de 1979 (2) Republica da Guine-Bissau, Recenseamento Geral da Populacao da Populacao e da Habitacao, 1991, Resultadao Preliminares. |
| Notes | Population data were projected 2o 2000 using growth rates derived from United Nations national level estimates and projections. |
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Page Modified: September 2004
