Topography describes the physical features of an area of land, including natural formations like mountains, rivers, and valleys, as well as manmade features. It studies elevation, location, and the distribution of landforms. Topographical maps show these physical features and use contour lines and other methods to depict elevation changes. Bangladesh has a diverse topography consisting of a broad alluvial plain, a slightly elevated older plain, and some hill regions drained by rivers. Topography is important for uses like agriculture, the environment, weather prediction, and military strategy.

1. Assalamu Alaikum
Topography of Bangladesh
Name: Umaer Abdullah Zaki
Reg no: 2015336058
Dept.: Petroleum & Mining Engineering
Institute: Shahjalal University of Science &
Technology, Sylhet-3114.

2. So what’s topography ?
 Topography describes the physical features of an area of land. These features typically
include natural formations such as mountains, rivers, lakes, and valleys.
 Manmade features such as roads, dams, and cities may also be included.
 configuration of a land surface including its relief and contours, the distribution of
mountains and valleys, the patterns of rivers, and all other features, natural and artificial, that
produce the landscape.

3. Topographical Features
Topography studies the elevation and location of landforms.
 Landforms - Landforms studied in topography can include anything that physically impacts the area.
Examples include mountains, hills, valleys, lakes, oceans, rivers, cities, dams, and roads.
 Elevation - The elevation, or height, of mountains and other objects is recorded as part of
topography. reference to sea level
 Latitude - Latitude gives the north/south position of a location in reference from the equator.
 Longitude - Longitude gives the east/west position of a location. Longitude is generally measured
in degrees from the Prime Meridian.

4. Topographical map
 Shows the physical features of the land including relief, vegetation cover, water bodies.
 Topography by means of contour lines, plastic shading, hatching, or other graphic devices
 Large-scale topographic map even includes the locations of market-places, petrol-pumps,
education institutes, rural narrow roads, etc.
 Shows the elevation changes of the land. Elevation is shown using contour lines.

5. Topographical map
Contour Lines Large Scale topgraphic map

6. Topography of
Bangladesh
(Landforms & Elevation)
Bangladesh has a considerable
topographic diversity. It has three
distinctive features:
(i) a broad alluvial plain subject to
frequent flooding,
(ii) a slightly elevated relatively older plain,
and
(iii) a small hill region drained by flashy
rivers

7. Topography of Bangladesh
(Location)
Geographic Location of
Bangladesh
 From 20º34″ North Latitude to 26˚38″
North latitude .
 From 88˚01″ East longitude to 92˚41″
East longitude .

8. Ways Topography is Studied
 Direct survey - A direct survey is when a person on the
ground uses surveying equipment, such as levels and
clinometers, to directly measure the location and
elevation of the land.
 Indirect survey - Remote areas may be mapped using
indirect methods. These methods include satellite
pictures, images taken from planes, radar, and sonar
(underwater).

9. What is topography used for?
Topography has a number of uses including:
 Agriculture - Topography is often used in agriculture to determine how soil can be conserved
and how water will flow over the land.
 Environment - Data from topography can help to conserve the environment.
 Weather - Meteorologists use information on mountains, valleys, oceans, and lakes to help
predict the weather.
 Military - Armies throughout history have used information on elevation, hills, water, and other
landforms when planning their military strategy.

10. Acknowledgement
 Physical features of Bangladesh by Mahmudul Sohan
 Wikipedia- Topographic Map
 http://www.ducksters.com/
 Banglapedia-Topography
 www.mapsofworld.com
And Google & Internet!

11. Thanks
ASSALAMU ALAIKUM