Until 1962 Trinidad and Tobago, now a Republic in which
Tobago has semi-autonomous status, was a British Crown
Colony, and topographic mapping was undertaken by the
Directorate of Overseas Surveys (DOS), (now Ordnance
Survey International (OSI)). This began in about 1950 and
continued after independence until 1977. The present
mapping authority is the Lands and Surveys Department
(LSD), Port of Spain.
The most recent DOS series of Trinidad was the 1:25,000
scale DOS 316/1, which covered the northern and southern
parts of the island in 30 sheets. This program terminated
in 1977, but subsequently the eight sheets covering the
central area were also completed by LSD. DOS 316/1 is on a Transverse
Mercator projection, International 1924 ellipsoid, with
UTM grid and 50 ft contours. It is litho-printed in seven
colors. There are plans for a new series of
1:25,000 scale sheets covering Trinidad and based on 1994
photography, but currently priority is being given to preparation
of 1:25,000 scale cadastral sheets. General purpose
maps of Trinidad are published by LSD at 1:150,000 and
1:75,000 scales. The latter has contours at 30 m and 100 m
intervals and both are on the UTM projection, International
1924 ellipsoid. A general road map of Trinidad,
which includes distances and tourist information was last revised in 1990.
Tobago is currently covered in three sheets in a 1:25,000
scale series (DOS 307) on the Cassini projection, Clarke 1858
ellipsoid, with 25 ft contours, and by a 1:50,000 scale map
published by LSD in color but without contours, and with
a selection of tourist symbols. The (DOS 307) sheets were
published in a second edition in 1969. There is also a 1:10,000 scale, 19-sheet cover of
Tobago published by DOS in 1962 on the Cassini projection.
Soviet military topographic mapping of Trinidad and Tobago is available at the following scales: 1:1,000,000 (1 sheet, complete coverage, published in 1987) and
1:500,000 (2 sheets, complete coverage, published in 1964). These products are available in print, digital raster and digital vector GIS formats
from East View Geospatial.
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