Give the application of remote sensing. 

1 Answer

Answer :

Applications of remote sensing:-

Remote sensing is widely applicable in the following areas.

1) Applications of Remote sensing with respect to natural hazard. e. g In case of flood,earthquake ,volcano eruption and related hazards, land slides, Tsunami, cyclone, etc.

2) Environmental application: Series of satellite used for weather forecast i.e. cyclone, cloud, wind velocity, sea states, pollution, global warming, and ozone layer depletion.

3) Land use and land cover Analysis: Land use for urban purpose, agricultural, sea, forest etc. particular cropping pattern spread area.

4) Archaeology:-To recognize archaeological patterns of prehistoric land use, buried archaeologically important sites.

5) Revision of topo sheets: Rapid revision and updating of existing topo sheets (maps) with help of aerial photography and satellite imagery, survey of India department undertake such work.

6) Alignment of (new) highways and rail-lines: - By using aerial photographs and satellite imagery, location of most economical alternative sites of such works may be carried out easily.

7) Location of gravity dam sites :- Geological investigation of dam site can be carried at using aerial photographs and satellite imagery (Geological features such as folds, faults,  dykes, fractures, rock type).

8) Tunneling: - Geological information (i.e. Faults & fractures) along alignment of tunnel is furnished by aerial photographs and satellite imagery to ensure safety during construction and maintenance of tunnel.
9) Silting of storage reservoir, harbors etc.:- Satellite imagery gives idea about silting of reservoir (reduces reservoir capacity) qualitatively and quantitatively and silting of harbor (reduces navigational depth).
10) Location of percolation tanks: To locate exact location of percolation tank from geological investigation of permeable foundation to increase ground water table by using satellite imagery.
11) Seepage losses in canal: By careful study of aerial photograph and satellite imagery, soil moisture in and around the canal system can be monitored to identify the seepage through the canal.
12) Location of bridge site: Careful study of aerial photograph and satellite imagery used to analyze existing foundation conditions along the proposed bridge construction site.
To find economic and safe alignment of bridge.
13) Study of catchment and command area of dam site: Aerial photographs and satellite imagery used to ascertain the catchment area and command area of dam site.
14) Mineral exploration: Detailed exploration of non –renewable resource like minerals and fossil fuels, geological data, location of minerals, mapping of mineral zones. 

Related questions

Description : State the application of remote sensing in various fields.

Last Answer : Applications of remote sensing:-  Remote sensing is widely applicable in the following areas. 1) Applications of Remote sensing with respect to natural hazard. e. g In case of flood, ... resource like minerals and fossil fuels, geological data, location of minerals, mapping of mineral zones.

Description : Explain application of remote sensing in civil engineering.

Last Answer : Applications of remote sensing - Remote sensing is widely applicable in the following areas. 1. Resource exploration - The underground resources like fossil fuels, mineral and oil deposits can be explored ... features like hill, valley, trees, houses etc. can be determined in highly steep slopes.

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Last Answer : Applications of Remote Sensing in Civil Engineering 1) Silting of storage reservoirs harbors etc. - Remote sensing technique that makes use of satellite imagery gives idea about the silting of ... Impact studies 6) Natural Hazard mapping or assessment 7) Water Resources availability.

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Description : State the advantages and limitation of remote sensing.

Last Answer : Advantages of remote sensing: 1. Relatively cheap and rapid method of acquiring up-to-date information over a large geographical area. 2. It is the only practical way to obtain data from ... knowledge of phenomena you are sampling. 4. Thus one can say that data interpretation is difficult.

Description : State the practical applications of remote sensing in civil engineering project.

Last Answer : The practical applications of remote sensing in civil engineering project are : 1) Applications of Remote sensing with respect to natural hazard : In case of flood , earthquake ,volcano eruption and ... and satellite imagery used to ascertain the catchment area and command area of dam site.

Description : State any two advantages and limitations of remote sensing. 

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Last Answer : Application of digital theodolite:- 1. To measure horizontal angle very precisely up to one second. 2. To measure vertical angle accurately up to one second. 3. To set out control ... reduced levels of ridge and valley lines accurately. 5. To determine horizontal distance more precisely. 

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Last Answer : Types of curve : The curve is classified broadly in two categories 1. Horizontal curve - When the points of curve are joined in horizontal plane then it is known as horizontal curve. 2. Vertical ... roadway or railway tracks. Vertical curves are of four types. a) Summit curve b) Valley curve

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Description : Give the classification of curve and Define 1.Transition curve 2. Reverse curve

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Description : Define grade contour. Give the procedure to locate grade contour on contour map with suitable sketch.

Last Answer : Grade Contour - It is the contour established on a specific grade or gradient along the hill side. OR   The line joining the points of equal grade or gradient is termed as grade contour.  ... all the marked points will give us the required grade contour of 1 in 30 accurately. 

Description : Give the simplest method of finding the area of zero of a zero circle from manufacturers table.

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Description : Describe stepwise procedure to prepare the layout of a small building using total station.

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Description : Describe the procedure to determine co-ordinates of a station using GPS. 

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Description : Explain the temporary adjustment of theodolite. 

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Description : Describe any one method of orientation of plane table surveying

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Description : Name two software for GPS. 

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Description : List two uses of EDM. 

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Description : Explain direct method of contouring.

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Description : Define transiting and swinging of theodolite.

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Description : What do you mean by zero circle in area measurement?

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Description : What are the different methods of contouring? Describe any one method along with sketch . Also write the situation where it is suitable

Last Answer : There are two methods of contouring:- 1. Direct Method 2. Indirect Method - a. By squares  b. By cross section  c. By tacheometric Direct method of contouring - In this ... joining these identical coloured pegs, we get the required contours on ground by this direct method of contouring. 

Description : State any four uses of digital theodolite.

Last Answer : The uses of digital theodolite are as follows. 1. To measure horizontal angle vey precisely up to one second. 2. To measure vertical angle accurately up to one second. 3. To set ... reduced levels of ridge and valley lines accurately. 5. To determine horizontal distance more precisely

Description : Define tacheometry. State the principle of tacheometry with sketch.

Last Answer : Tacheometry : It is the branch of angular surveying in which horizontal and vertical distances are determined from instrumental observations only, is known as tacheometry. Principle of tacheometry : ... to corresponding staff intercept remains constant as shown below in figure 3

Description : List any four modern survey instruments.

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Description : State any two situations under which tacheometry is preferred. 

Last Answer : Tacheometry is preferred in following situations. 1. When horizontal distances can't be measured by chaining on highly uneven ground. 2. When vertical distances or reduced levels can't be measured ... is necessary to fill the details in topographic map and contour map with low degree of precision.

Description : State any four uses of transit theodolite.

Last Answer : Transit theodolite is useful for the following. 1. To measure the horizontal and vertical angles between survey stations. 2. To measure deflection angles between survey lines. 3. To measure horizontal ... tubular compass to it. 6. To prolong or extend the survey line up to required destination.

Description : Write the use of Gale’s table.

Last Answer : Gale’s traverse table is useful to find out independent coordinates of theodolite traverse by applying necessary corrections to consecutive co-ordinates of the same traverse. Further these independent co-ordinates are useful to draw the accurate traverse without linear and angular errors.

Description : What is a contour map? Write any two objects of preparing contour map.

Last Answer : Contour map : It the map showing nature of topography of any particular field with the help of contour lines indicating reduced levels of ground. Objects of preparing contour map : Contour map ... . 4. To excavate the canal and contour cut trenches along hillside under watershed management works.

Description : In a contour map, if contours are crossing each other, what will be nature of topography? Draw the sketch to support your answer.

Last Answer : If contours are crossing or intersecting each other, then there is overhanging cliff as shown in figure 1 below.

Description : State the possible error while using planimeter for finding area of an irregular figure.

Last Answer : Possible error while using planimeter for finding area of an irregular figure: 1) Instrumental Error i) Roller of planimeter which must rotate the axis freely and withot vibrations, if not, then ... vi) Error in setting of arm length. vii) Overlapping or repetition in tracing boundary.

Description : What are the additive and multiplying constants of planimeter?

Last Answer : Area of the irregular figure measured by planimeter is given by:  Where M = Multiplying constant  C = Additive costant Multiplying Constant: It is the multiplier whose value is marked on ... It is taken in to consideration only when anchor point is inside the figure, else it is zero.

Description : Describe the use of digital theodolite for measurement of horizontal and vertical angle.

Last Answer : I) Procedure for measurement of horizontal angle with digital theodolite: 1) Taking out digital theodolite for box and fix it on tripod over required station. 2) Approximate leveling by leg adjustment and ... and take the reading at B. 9) Difference of two angle gives required vertical angle AOB