unit I
Introduction and Basic Concepts: Introduction, Objectives, classification and principles of
surveying, Scales, Shrinkage of Map, Conventional symbols and Code of Signals, Surveying
accessories, phases of surveying.
Measurement of Distances and Directions
Linear distances- Approximate methods, Direct Methods- Chains- Tapes, ranging, Tape corrections.
Prismatic Compass- Bearings, included angles, Local Attraction, Magnetic Declination and dip.
Surveying instruments; chains, tapes, steel bands, their types & uses.
Ranging & Chaining of Survey lines. Field work & Plotting of Chain survey,Leveling,General principle. Types of levels and their temporary and permanent adjustments. Methods of levelling. Reduction of levels, Precise levelling and Trigonometric Leveling.
Theodolite.
Types and uses of theodolites. Temporary and permanent adjustments. Measurement of horizontal and vertical angles.
,ranging & chaining of survey lines. field work & p ,surveying instruments ,chains ,tapes ,steel bands ,their types & uses. ,leveling ,general principle. types of levels and their tempo ,precise levelling and trigonometric leveling. total station ,edm ,modern surveying instrument
unit I
Introduction and Basic Concepts: Introduction, Objectives, classification and principles of
surveying, Scales, Shrinkage of Map, Conventional symbols and Code of Signals, Surveying
accessories, phases of surveying.
Measurement of Distances and Directions
Linear distances- Approximate methods, Direct Methods- Chains- Tapes, ranging, Tape corrections.
Prismatic Compass- Bearings, included angles, Local Attraction, Magnetic Declination and dip.
Surveying instruments; chains, tapes, steel bands, their types & uses.
Ranging & Chaining of Survey lines. Field work & Plotting of Chain survey,Leveling,General principle. Types of levels and their temporary and permanent adjustments. Methods of levelling. Reduction of levels, Precise levelling and Trigonometric Leveling.
Theodolite.
Types and uses of theodolites. Temporary and permanent adjustments. Measurement of horizontal and vertical angles.
,ranging & chaining of survey lines. field work & p ,surveying instruments ,chains ,tapes ,steel bands ,their types & uses. ,leveling ,general principle. types of levels and their tempo ,precise levelling and trigonometric leveling. total station ,edm ,modern surveying instrument
in this section the study of the various classification of the surveying. which based the surveying is classified and how many types of the surveying? all this is presented in this slide.
and that slide how it work?
In some cases it will be watched that numerous checks like waterways, channels, lakes. thick wildernesses, trench, structures, and so on lie on the chain line. These obstructions can be kept away from in tying operation by applying some principal geometric principles.
In this ppt you will find about the Types of obstacles in chain surveying and the solutions to overcome this obstacles.
To see more about chain surveying visit here http://wikienvironment.org/chain-surveying
Surveying is an important part of Civil engineering. Various part like theodolite, plane table surveying, computation of area and volume are useful for all university examination and other competitive examination
Introduction to surveying, ranging and chainingShital Navghare
This presentation contains the complete introduction of surveying. It also includes all the instrucments used in linear measurement and the terms related to Ranging and Chaining
in this section the study of the various classification of the surveying. which based the surveying is classified and how many types of the surveying? all this is presented in this slide.
and that slide how it work?
In some cases it will be watched that numerous checks like waterways, channels, lakes. thick wildernesses, trench, structures, and so on lie on the chain line. These obstructions can be kept away from in tying operation by applying some principal geometric principles.
In this ppt you will find about the Types of obstacles in chain surveying and the solutions to overcome this obstacles.
To see more about chain surveying visit here http://wikienvironment.org/chain-surveying
Surveying is an important part of Civil engineering. Various part like theodolite, plane table surveying, computation of area and volume are useful for all university examination and other competitive examination
Introduction to surveying, ranging and chainingShital Navghare
This presentation contains the complete introduction of surveying. It also includes all the instrucments used in linear measurement and the terms related to Ranging and Chaining
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Contouring - Surveying...for civil Engineering and Architecture..Pramesh Hada
Contouring - Surveying...for civil Engineering and Architecture students. It contains all the syllabus according to Pokhara University, Nepal
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http://sandymillin.wordpress.com/iateflwebinar2024
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2. PREPARED BY
JANI GAUTAM A.
PATEL SAGAR N.
CHAUDHRI ANKIT N.
BHAGAT RADESH H.
PATEL HARSH S.
BHUTA YASH J.
GURASIYA SAUR P.
PUNJAB EDUSAT SOCIETY (PES)
2
GUIDED BY- PROF KHUSBU RAVAL
-PROF SONERI FALGUNI
3. Contour An imaginary line on the ground
surface joining the points of equal elevation is
known as contour.
In other words, contour is a line in which the
ground surface is intersected by a level
surface obtained by joining points of equal
elevation. This line on the map represents a
contour and is called contour line.
2CONTOURING 2
4. Contour Map
A map showing contour lines is known as
Contour map.
A contour map gives an idea of the altitudes of
the surface features as well as their relative
positions in plan serves the purpose of both, a
plan and a section.
3CONTOURING 3
5. Contouring
The process of tracing contour lines
on the surface of the earth is called
Contouring.
3CONTOURING 4
6. PURPOSE OF CONTOURING
Contour survey is carried out at the starting of
any engineering project such as a road, a
railway, a canal, a dam, a building etc.
i) For preparing contour maps in order to
select the most economical or suitable site.
ii) To locate the alignment of a canal so that it
should follow a ridge line.
iii) To mark the alignment of roads and
railways so that the quantity of earthwork
both in cutting and filling should be
minimum.
4CONTOURING 5
7. iv) For getting information about the ground
whether it is flat, undulating or
mountainous.
v) To find the capacity of a reservoir and
volume of earthwork especially in a
mountainous region.
vi) To trace out the given grade of a particular
route.
vii)To locate the physical features of the
ground such as a pond depression, hill, steep
or small slopes.
PURPOSE OF CONTOURING (contd.)
CONTOURING 6
8. CONTOUR INTERVAL
The constant vertical distance between two
consecutive contours is called the contour
interval.
HORIZONTAL EQUIVALENT
The horizontal distance between any two
adjacent contours is called as horizontal
equivalent.
The contour interval is constant between
the consecutive contours while the horizontal
equivalent is variable and depends upon the
slope of the ground.
CONTOURING 7
9. CHARACTERISTICS OF CONTOURS
i) All points in a contour line have the same
elevation.
ii) Flat ground is indicated where the …
contours are widely separated and steep-
slope where they run close together.
iii) A uniform slope is indicated when the
contour lines are uniformly spaced and
iv) A plane surface when they are straight,
parallel and equally spaced.
CONTOURING 13
10. CHARACTERISTICS OF CONTOURS
v) A series of
closed contour
lines on the
map represent
a hill , if the
higher values
are inside
A HILL
60
65
70
75
80
60
65
70
75
80
HILL
11. CHARACTERISTICS OF CONTOURS
vi) A series of
closed contour
lines on the
map indicate a
depression if
the higher
values are
outside
A DEPRESSION
70
60
65
70
75
80
DEPRESSION
60
65
70
75
80
15CONTOURING
12. CHARACTERISTICS OF CONTOURS
vii) Contour line cross ridge or valley line at
right angles.
If the higher
values are inside
the bend or loop
in the contour, it
indicates a
Ridge.
RIDGE LINE
100
90
80
70
60
50
16CONTOURING
13. CHARACTERISTICS OF CONTOURS
vii) Contour line cross ridge or valley line at
right angles.
If the higher
values are
outside the
bend, it
represents
a Valley
VALLEY LINE
100
90
80
70
60
50
17CONTOURING
14. viii).
Contours cannot end anywhere but close on
themselves either within or outside the limits of
the map.
CHARACTERISTICS OF CONTOURS
18CONTOURING
15. ix).
Contour lines cannot
merge or cross one
another on map
except in the case of
an overhanging cliff.
CHARACTERISTICS OF CONTOURS
40 30 20 10
OVERHANGING CLIFF
10
20
30
40
19CONTOURING
16. x) Contour lines
never run into one
another except in
the case of a
vertical cliff. In
this case ,several
contours coincide
and the horizontal
equivalent becomes
zero.
CHARACTERISTICS OF CONTOURS
403020
50
OVERHANGING CLIFF
10
20
30
40
VERTICA
CLIFF
50
10 50
20CONTOURING
17. CHARACTERISTICS OF CONTOURS
X Depressions
between summits is
called a saddle. It is
represented by four
sets of contours as
shown. It represents
a dip in a ridge or
the junction of two
ridges. And in the
case of a mountain
range ,it takes the
form of a pass .
SADDLE70
80
90
70
80
90
110
100
90
21CONTOURING
Line passing through the
saddles and summits gives
water shed line.
18. DRAWING THE CONTOUR LINES
Contour lines are drawn as fine and smooth free
hand curved lines. Sometimes they are represented by
broken lines .They are inked in either in black or brown
colour. A drawing pen gives a better line than a writing
pen and French curves should be used as much as
possible .Every fifth contour is made thicker than the
rest.
The elevation of contours must be written in a
uniform manner, either on the higher side or in a gap
left in the line .When the contour lines are very long,
their elevations are written at two or three places along
the contour .In the case of small scale maps, it is
sufficient to figure every fifth contour.
45CONTOURING
19. USES OF CONTOUR MAP
45CONTOURING
(i) A contour map furnishes information regarding the features
of the ground , whether it is flat, undulating or mountainous.
(ii) From a contour map , sections may be easily drawn in any
direction
(iii) Intervisibility between two ground points plotted on map
can be ascertained
(iv) It enables an engineer to approximately select the most
economical or suitable site for an engineering project such as
a road, a railway, a canal or a pipe line etc.
(v) A route of a given grade can be traced on the map.
(vi) Catchment area and capacity of a reservoir may be
determined from the contour map.
(vii) Contour map may be used to determine the quantities of
earth work.