Formerly part of French West Africa, Niger became an independent
republic in 1960. Topographic survey was undertaken
by the French Institut Géographique National
(IGN), and its predecessors, and IGN mapping support
continued after independence in cooperation with the
Service Topographique et du Cadastre, Niamey. The responsible
organization in Niger is now the Institut
Géographique National du Niger (IGNN).
The principal topographic series is at 1:200,000 scale, and
this began as a provisional, planimetric map in 1922, but
was progressively replaced after 1955 by a four-color Carte
régulière, derived from 1950s air photography. The projection
is UTM, Clarke 1880 ellipsoid, and contours are at
40 m intervals. There is a complete cover of the country in
119 one-degree sheets at this scale, although some sheets of
the northern desert areas are still in a provisional format
(Fonds topographiques or planimétriques). A new edition of some sheets has
appeared since 1982.
A limited amount of 1:50,000 scale mapping has been
completed, covering the southern areas close to the border,
and a small area to the north of, including Agadez.
Some sheets are photomaps, and recently a few SPOT image
maps (spatiocartes) have been produced. A number of sheets
in the east of the country form part of the cross-border Lake
Chad Basin Commission series of photomaps produced by
the British Directorate of Overseas Surveys (now Ordnance
Survey International (OSI)). The Japanese International
Co-operation Agency (JICA) provided aid in 1992-95 for the
production of 36 1:50,000 scale sheets.
Some 1:500,000 scale mapping appeared between 1939 and
1968, but only 12 sheets were published.
Soviet military topographic mapping of Niger exists at the following scales: 1:1,000,000 (9 sheets, complete coverage, published 1979-1991);
1:500,000 (29 sheets, complete coverage, published 1977-1988); 1:200,000 (187 sheets, complete coverage, published 1979-1986) and a city (1:10,000)
topographic map of Niamey published in 1976. These products are available in print, digital raster and digital vector GIS formats from East View Geospatial.
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