Africa Surface Hydrography, 1984

The First-Third Order Stream Network member of the African Surface
Hydrography data set is part of the UNEP/FAO/ESRI Database project
that covers the entire world but focuses here on Africa. The maps were
prepared by Environmental Systems Research Institute (ESRI), USA. Most
data for the database were provided by the Land and Water Development
Division of the Food and Agriculture Organization (FAO), Italy. The
database was developed by the United Nations Environment Program
(UNEP), as part of a project initiated by the same. The base map used
was the FAO/UNESCO Soil Map of the World, scale 1:5000000 (1977) in
Miller Oblated Stereographic projection. All sources were
re-registered to the base map by comparing known features on the base
map and the source maps. The digitizing was done with a spatial
resolution of 0.002 inches. The maps were then transformed from inch
coordinates to latitude/longitude degrees. The transformation was done
using an unpublished algorithm by US Geological Survey and ESRI) to
create coverage for one-degree graticules.

References:
ESRI. Final Report UNEP/FAO World and Africa GIS data base (1977).
Internal Publication by ESRI, FAO and UNEP
FAO. UNESCO Soil Map of the World.(1977). Scale 1:5000000. UNESCO,
Paris

Source :FAO/UNESCO Soil Map of the World. Scale 1:5000000
Publication Date :Dec 1984
Projection :Geographic (lat/lon)
Feature type :line
Related Data sets :All UNEP/FAO/ESRI Data sets, Outline of Africa
OUTLINE3.E00, HYDRMAJLL, HYDRMINLL (Surface Hydrography), Hydrologic Basins

Comment : No boundary (outline) for Africa.