Formerly part of French Equatorial Africa, Chad became
fully independent in 1960. Topographic mapping of the
country had been started by the French Institut
Géographique National (IGN) in the early 1950s and
continued in co-operation with the Directeur du Cadastre et
de la Topographie, N'Djamena. In 1990, a new cartographic
service was established as the Service de la Cartographie,
Direction du Cadastre (SCDC).
Almost complete cover of the country at 1:200,000 scale
was issued by IGN over the period 1957-77. Most of the
south of the country is covered by sheets in the four-colour,
regular edition, while many of those in the north are in the
Fond topographique or planimétrique format. Projection is
UTM, Clarke 1880 ellipsoid and sheets are graticule-based,
each covering one degree.
Some four-colour 1:50,000 scale mapping on 15-minute
quadrangles was produced by IGN near the southern border
in 1950s, and a few more sheets were completed in the late
The Lake Chad Basin Commission (LCBC/CBLT)
1:50,000 series produced by the British Directorate of
Overseas Surveys in the late 1970s covers Lake Chad and
adjacent areas. The 59 sheets in this photomap series are
not restricted to Chad, but also cover parts of Niger, Nigeria
and Cameroon. The projection of these maps is Transverse
Mercator, Clarke 1880 ellipsoid.
SCDC's main mapping activity has been the production of a number of
town and city plans, including a two-sheet plan of
N'Djamena at 1:10,000 scale published in 1988. Generally, lack of funding has precluded the production of
new mapping activity in Chad.
Soviet military topographic mapping for Chad exists at the following scales: 1:1,000,000 (11 sheets, complete coverage, published 1983-1991);
1:500,000 (32 sheets, complete coverage, published 1979-1989); 1:200,000 (200 sheets, complete coverage, published 1979-1984) and city (1:10,000) topographic
map of Ndjamena published in 1976. These products are available in print, digital raster and digital vector GIS formats from East View Geospatial.
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