THE WONDER KID?

PRESENTED BY: KEDAR S. PONKSHE B.E(CIVIL), M.E(GEOTECH), aiv.

It is Only As Good As Person Using It.

So …..

How Good Are We? OR Can We Be?

Mapping was present from historic times. Scientific mapping came of age in early 19th century Scientific Mapping of Indian Subcontinent Started

early 19th Century. Initial purpose of the survey was purely scientific, To

Measure Earths Curvature. Later scope was extended to detail mapping of

entire subcontinent.

Instruments could measure angles with higher accuracy.

Use of Glass Lenses provided magnification, enabling longer sights.

Standardisation of distance measuring units and measurement tools.

Determine Position of an Object on Map. Compile Position Data of Number of Objects & Prepare a

Map. Determine Elevation of Ground Surface and Manmade

Structure. Determine Distance, Areas, Volumes. Determine Depth of Water, Height of Mountain, Width of

Rivers. Check Height, Dimensions of Structures vis-à-vis Design. Layout Structure Alignment as per Design. AND Anything Else Surveyor Can Achieve with His Survey

Instrument.

Measure Distance (Almost Always) in Straight Line, Shortest Between Two Points.

Measure Horizontal Angle Either, Absolute Value or Graphically.

Measure Vertical Angle. Measure Height From A Datum. Use Any One or Any Combination of Above Steps to

Locate a Point

Metric Chain Magnetic

Compass Theodolite Dumpy Level Plane Table Leveling Staff Measuring tape

First Theodolite Used by Survey Of India, Weight @ 500kg.

Measuring tape Laser Distance Meter Total Station Laser Level GPS DGPS

Topographic Measurement i.e measure co-ordinate, elevation, point code

Setting Out of Buildings, Roads, Buildings Offsets- Mark line parallel to given line. Intersection of Two Lines Extend Given Line Transform Co-ordinates Calculate Distance, Area, Volume Divide Area

NONOLeast Count – Angle 1” & 0.1” Distance 1mm, 0.1mmAccuracy - 1”, 2”, 3”, 5”, 7”

What is The Purpose of Survey? Is The End Result Expected Clear Enough? Is it Achievable by Instruments At Hand? in Given Site Conditions, Available Data is Sufficient? Communicate with Surveyor your purpose & requirement

from Survey. Discuss with him site conditions. Understand How Surveyor is going to achieve the

required goal. Try to collect Old Survey Maps, Drawings & share with

surveyor. Ensure Surveyor is thinking in same plane as you.

Ensure, Surveyor has understood the scope He has necessary drawings & data He is collecting data, giving points to meet

your requirements.Once you have ensured this, PLEASE leave the work to surveyor, over

supervision is irritating & actually a distraction. Avoid unnecessary crowding around

instrument Remember Tripod is HOLY, mind your FEET.

Surveying is a Team Activity,

& YOU are part of it.

Think I am A Good Teacher?

A Day Spent on Site Under Scorching SUN is the Best

Teacher!!GOOD LUCK!!!