The Service Géographique National was formed in 1972,
and in 1989 it was reorganized under the Ministère de
l'Equipement, des Transports et de la Mer to become the
Direction des Travaux Géographiques et Cartographiques
(DTGC), Dakar. Further restructuring in 1990
created two divisions, one for land and aerial survey and the
other for cartography. Its current program includes
the completion of the 1:50,000 scale topographic map and
large scale mapping of regional capitals and development
The first topographic surveys were carried out by the French
Institut Géographique National (IGN) and its predecessors,
producing maps in the three Carte de l'Afrique de l'Ouest
series, through its agency in Dakar. Maps were compiled at
1:50,000; 1:200,000 and 1:500,000 scales from aerial
photography flown in the 1950s. The 1:200,000 scale series
was completed by the French in the early 1970s, and revisions
of some sheets were published through the 1970s and
into the early 1980s. Although some sheets have subsequently
been reprinted, there are no plans further to update
this series. Early sheets are titled as part of the Carte de
l'Afrique de l'Ouest series, while the more recent sheets,
published jointly with DTGC, are labelled République du
Sénégal. These maps are in the standard French overseas
mapping style, published normally in four colors with 40 m
contours, and on UTM projection, Clarke 1880 ellipsoid.
Soviet military topographic mapping of Senegel is available at the following scales: 1:1,000,000 (3 sheets, complete coverage, published in 1986);
1:500,000 (8 sheets, complete coverage, published 1984-1985); 1:200,000 (41 sheets, complete coverage, published 1982-1985) and a city (1:10,000) topographic
map of Dakar published in 1975. These products are available in print, digital raster and digital vector GIS formats from East View Geospatial.
The basic scale mapping is the 1:50,000 scale series, but
this was not completed by the French. In 1989-92, Japan
funded the mapping and publication of 43 new 1:50,000
scale sheets in the eastern part of the country, but further
progress with the series awaits new funding. This series is
also in four colors and on UTM projection, but with
contours at 20 m intervals. There are also plans to re-map
the area of greater Dakar, but this too depends on the availability
of further overseas aid.
A series of maps of individual departments (6) and regions (7)
has been created from the 1:200,000 or 1:500,000 scale topographic
maps, and these were all brought up to date in 1993.
Small scale mapping includes a four-sheet 1:500,000 scale
map, edited into a tourist format in 1966, and a folded 1:1,000,000 road and tourist map
revised in 1993 in the French IGNPays et villes du Monde series.
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