# State any four uses of contour.

State any four uses of contour.

By studying a contour map :

1) The nature of the ground surface or topography of a country whether hilly, undulating or flat can be understood.

2) Possible routes of communication between two different places can be known.

3) The capacity of a reservoir or the area of catchment can be determined approximately.

4) The visibility of points can be established.

5) A suitable route for a given gradient can be marked on the map.

6) The suitable site for most economical alignment can be selected for any engineering projects like dams, canals, roads, sewers, railways, etc.

7) A section of the ground surface can be drawn any direction from the contour map.

8) Quantities of earthwork can be determined approximately.

## Related questions

Description : State the uses of contour map.

Last Answer : Following are the uses of contour maps. 1.The nature of the ground surface or topography of a country weather hilly, undulating ,or flat can be understood. 2. For determining the ... volume of cutting and embankment in given gradient. 6.For determining intervisibility of given points.

Description : State any four applications of contour map

Last Answer : Following are the applications of Contour map. 1. With the help of contour lines on contour map one can know the nature of ground. 2. For determination of most economical site for dams ... of cutting and embankment in given gradient. 6. For determining the indivisibility of two given points

Description : State the methods of contour interpolation and explain in brief any one.

Last Answer : Methods of interpolation:- i) By Arithmetic calculations ii) By Estimation iii) By Graphical method i) By Arithmetic Calculation: This is very tedious but accurate method and is used for small areas ... in fig.) may now be pricked through the position of the contour points on line PQ.

Description : Define interpolation of contour and state its methods.

Last Answer : The process of spacing the contours proportionately between the ground points is known as “Interpolation of Contours”. The contours may be interpolated by: 1. Estimation 2. Arithmetical calculations. 3. Graphical method.

Description : Apply knowledge of total station to prepare a contour map by describing its procedure.

Last Answer : Procedure of preparing contour map using total station1) Preliminary set up - Fix the total station over a station and level it. Press the power button to switch on the instrument. ... computer in the appropriate format. 8) Using appropriate application software, contour map will be prepared.

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 : 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 : How will you locate grade contour on contour map.

Last Answer : Procedure for establishing grade contour on ground : The grade contour along hill side can be established by following procedure. 1. Suppose a grade contour of 1 in 30 is to be established on ground. ... all the marked points will give us the required grade contour of 1 in 30 accurately.

Description : Define 1) Contour 2) Contour Interval

Last Answer : Contour :- It is an imaginary line on the ground joining points of equal elevation or RLs.  Contour Interval :- The vertical distance between any two consecutive contours is known as a contour interval

Description : What is meant by grade contour? How it will be located in field?

Last Answer : 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. Procedure for ... all the marked points will give us the required grade contour of 1 in 30 accurately.

Description : Describe the procedure to locate grade contour in field

Last Answer : Line joining the point along the same gradient is called contour gradient or grade contour. All the points on a contour have the same elevation. But all the points on a contour gradient do not ... on contour of RL 64. Similarly others points are established to obtain the grade contour on field.

Description : Differentiate between contour interval and horizontal equivalent.

Last Answer : Contour Interval - The vertical distance between two successive contours or contour lines, is known as Contour Interval. Horizontal Equivalent - The horizontal distance between two successive contours or contour lines, is known as Horizontal Equivalent.

Description : Draw neat sketch of contour for the following i)Hill ii) Valley iii)Gentle Slope iv) Ridge Line

Last Answer : i)Hill ii) Valley iii)Gentle Slope iv) Ridge Line

Description : Explain the procedure of establishing grade contour on ground.

Last Answer : The grade contour along hill side can be established by following procedure. Suppose a grade contour of 1 in 30 is to be established on ground at an interval of 40 m. The points of grade contour ... joining all the marked points will give us the required grade contour of 1 in 30 accurately

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 : 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 : What is GPS. State any four uses of GPS

Last Answer : GPS is satellite navigation system used to determine the ground position of an object. Uses of GPS: 1.To prepare contour map 2 It is widely used in navigation. 3. To locate different points of ... fix alignment , positions of piers etc. 6 It gives accrate timing to banks, mobile oprators etc.

Description : State the uses of Global positioning system (GPS)

Last Answer : Uses of Global positioning system 1. To prepare contour maps. 2. To prepare longitudinal section of roads. 3. To prepare alignment of roads & bridges. 4. Used for navigation purpose.  5. For ... . 8. Used in Geographical information system. 9. Used in Military and Space 10. For Agriculture.

Description : List two uses of EDM.

Last Answer : 1.It is useful for measuring the distances that are difficult to access. 2. It is useful in topographical survey. 3.Measurement of base line in triangulation survey can be carried out speedily and ... construction of gravity dams. 5.It is useful in fixing alignment of road, railways, canals etc.

Description : Enlist the uses of total station in surveying.

Last Answer : The uses of total station are : 1) To measure horizontal, vertical and slope distances. 2) To measure horizontal and vertical angles. 3) To measure the level difference between points. 4) To carry out ... 6) To prepare layout of building. 7) For speedy completion of any type of project work.

Description : State any four characteristics of contours with sketches.

Last Answer : Characteristics of contours - The characteristics of contours are described in following statements with the help of necessary sketches. 1. All the points on contour line represent same reduced level or equal ... 8. The summit of four ridge lines represents saddle as shown in sketch 8.

Description : State four component parts of digital theodolite and state their purpose.

Last Answer : Component parts of digital theodolite and their purpose: 1. Control panel: to perform operations by giving commands to measure horizontal and vertical angles in left or right direction, to switch on ... fast and steady leveling. 7. Foot screws: for leveling of instrument by usual method.

Description : State any four special feature of total station.

Last Answer : Following are the special feature of total station. High accuracy and long measuring range. 1) High accuracy : (2 mm + 2 ppm) 2) Long measuring range with mini prism is 0.9 km ... with less reading error. Superior water-resistant and dust proof. No worry about sudden bad weather.

Description : State any four application of digital theodolite.

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.

Description : Enlist any four component parts of digital level. State the functions of each.

Last Answer : Following are the component parts of Digital Level: 1. Display screen: To show the program going on. It has high resolution. 2.Key Pad- For operating the instrument. 3.Telescope- For ... - Internal focusing is provided, so to observe the object clearly, it is focused with focusing screw.

Description : State any four advantages of total station over dumpy level and theodolite.

Last Answer : Advantages of total station over dumpy level and theodolite : 1)Total station gives digital measurements of sloping, horizontal and vertical distances aaccurately and precisely. 2) Total station gives digital ... computer. 6) Total station is used to prepare the map and drawings using softwares.

Description : State four objective of tachometry.

Last Answer : 1. Preparation of contour maps 2. Used in hydrographic survey 3. Location of roads, railways , reservoir. 4. To enable horizontal and vertical distances to be computed from readings upon a stadia rod in difficult terrain. .

Description : List any four modern survey instruments.

Last Answer : Following are the modern survey instruments. 1. Digital Level 2. Electronic Distance Meter (EDM) 3. Micro-optic Theodolite 4. Total Station 5. Global Positioning System (GPS) Device 6. Aerial Camera 7. Remote Sensors

Description : Write four applications of GIS.

Last Answer : Applications of GIS:- 1) Map making 2) Site selection 3) Mineral Exploration 4) Land use planning and management 5) Environmental Impact studies 6) Natural Hazard mapping or assessment 7) Water Resources availability.

Description : List any four essential characters of Tacheometer.

Last Answer : 1. The value of constant f/i = 100 Where, f = focal length i = length of image. 2. The telescope should be powerful, the magnification should be 20 to 30 times the diameter  3. The ... aperture of the objective should be 35 to 45mm in diameter in order to have a sufficiently bright image.

Description : State the function of Anallatic lens..

Last Answer : The function of anallatic lens is to make additive constant zero i.e.(f+d)=0 It simplifies the calculation.

Description : State two advantages of plane table surveying

Last Answer : 1.it is most rapid method of surveying. 2. it is suitable for magnetic areas. 3.The map can be prepared easily ,and does not require greater skill. 4.Irregular objects can be represented ... is less costly. 7 The check lines detects the errors of measurement and plotting on field itself.

Description : What is meant by zero circle? State the advantages of digital planimeter over polar planimeter.

Last Answer : Zero circle:- When the tracing point is moved along a circle without rotation of the wheel i.e. when the wheel slides without any change in reading ,the circle is known as the zero circle or ... are required for area. 3) It gives more accurate reading 4) Less time required for measurement

Description : State the component parts of micro optic theodolite . How it is superior to a transit theodolite. Also write the situation where it is suitable.

Last Answer : Component parts of micro optic theodolite 1) Telescope 2) Magnification with standard eyepiece. 3) Level tube 4) Foot screws. 5) Tribatch & Trivet 6) Optical micrometer 7) Changing nob 8) ... is most suitable 3) This instrument is durable for harsh environments. 4) It is simple in use.

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 : 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 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 : State the meaning of degree of curve and long chord.

Last Answer : Degree of curve : The angle subtended at the centre by a standard chord of 30 m length, is known as degree of curve. Long Chord : The straight line joining rear tangent point and forward tangent point is called as long chord of curve.

Description : State the principle of EDM with sketch.

Last Answer : Principle of EDM:- The fig shows a survey line AB, the length D of which is to be measured using EDM equipment placed at ends A. Let a transmitter be placed at A to propagate electromagnetic waves towards B ... measured at A. This will require EDM timing devices with an accuracy of 1 10-9s.

Description : State the limitations of tacheometry.

Last Answer : Tacheometry is a surveying method that uses optical instruments, such as a theodolite or total station, to measure horizontal and vertical angles and distances. Some limitations of tacheometry include: ... and experience of the operator, and human error can lead to inaccuracies in the measurements.

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 : State the methods of locating contours and explain direct method.

Last Answer : Methods of locating contours :- 1) Direct method 2) Indirect method i) By cross section ii) By Squares (Block Contouring) iii) Tachometric Method Direct method of contouring:- In ... identical coloured pegs, we get the required contours on ground by this direct method of contouring.

Description : State the two methods of setting out curves.

Last Answer : Methods of setting out curves :- 1) Method of offsets or ordinates from the long chord 2) By successive bisection of arcs 3) By offsets from tangents 4) By offsets from chords produced 5) Rankine’s method of tangential angles 6) Two Theodolite method

Description : State any two advantages of total station over dumpy level and theodolite.

Last Answer : Advantages of total station over dumpy level and theodolite :- 1) Total station gives digital measurements of sloping, horizontal and vertical distances accurately and precisely. 2) Total station gives ... data to computer. 6) Total station used to prepare the map and drawings using softwares.

Description : State the procedure of traversing by using total station.

Last Answer : The procedure is as follows. A) CENTERING THE TOTAL STATION: The instrument must be vertically above the survey station to ensure that horizontal angle observations are correct. The steps are as ... are plumbed over peg 1 and 3. Horizontal distances and angles are measured and recorded similarly.

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 classification of electronic distance meter.

Last Answer : Classification of electronic distance meter A) Classification based on the type of carrier wave used Instrument using visible light waves Instrument using invisible infra-red waves ... or transmitted wave. Reflecting type such as geodimeters Transmitting types such as tellurometer

Description : State components of one second micro-optic theodolite.

Last Answer : Component parts of micro optic theodolite 1) Telescope 2) Magnification with standard eyepiece. 3) Level tube 4) Foot screws. 5) Tribatch & Trivet 6) Optical micrometer 7) Microscope with ... -batch with foot screws 12) Plate level 13) Collimation slow motion screw 14 ) Horizontal clamp