The topographic mapping authority in Ecuador is the
Instituto Geográfico Militar (IGME), Quito, founded in
1928. Its responsibilities were defined by law in 1978 as
being those of surveying and mapping the national territory,
and archiving geographical data about the country.
Early topographic mapping, undertaken in the 1930s,
concentrated on the area around Quito and was at a scale of
1:25,000. In 1947, Ecuador entered a co-operative mapping
agreement with the Inter American Geodetic Survey. Aerial
photography was flown by the USAAF in 1961, and the
following year the 1:50,000 scale topographic series was
started. Subsequently, a 1:100,000 scale series was also initiated;
about one-third of the country had been covered at
this scale by the early 1990s. Except for a few areas in the east and
the north, cover is now almost complete at this scale,
although all mapping is confined to the area west of the line
of the Protocol of Rio de Janeiro 1942. There is also now
an extensive cover at 1:25,000 and a program of digitizing
the 1:50,000 and 1:25,000 scale series is in progress.
The 1:100,000 scale mapping is in seven colors including
a purple UTM grid, and has an 80 m contour interval and
auxiliary contours at 40 m. The 1:50,000 scale map is in
five colors with 20 m contours (40 m in the Sierra). Both
series are on Transverse Mercator projection with UTM grid.
The 1:100,000 scale sheets each cover 30' longitude by 15'
latitude, while those at 1:50,000 have a 15' x 10' format.
A 1:250,000 scale cover was initiated in the early 1980s
under the PAIGH Hemispheric Mapping Program, and
although this programme is no longer operative, further
sheets have been published.
General maps of the country are published by IGME at scales
of 1:500,000 and 1:1,000,000. IGME
has also published smaller scale provincial maps, tourist guide
maps of Quito, Guayaquil and Loja, and undertakes urban
mapping of numerous cities at scales ranging from 1:1,000 to
Soviet military topographic mapping of Ecuador exists at the following scales: 1:1,000,000 (9 sheets, complete coverage, published 1962-1990) and
1:500,000 (9 sheets, complete coverage, published 1964-1984). These products are available in print, digital raster and digital vector formats
from East View Geospatial.
Copyright © 2014 East View Geospatial, Inc.