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UNIT – I FUNDAMENTALS 5
Methods of Measuring Distance, Basic Principles of EDM, Historical Development Classifications, applications and comparison with conventional surveying.
UNIT – II BASIC ELECTRONICS 10
Oscillators (Crystal controlled and Gunn diode) Kerrcell / Pockel’s modulator, Frequency mixing, modulation and Demodulation Measurement of phase differences, reflectors (Corner, Antenna), Transducers and power sources.
UNIT – III ELECTROMAGNETIC WAVES 20
Classification and applications of Electromagnetic waves, Propagation properties, wave propagation at lower and higher frequencies. Refractive index, factors affecting RI, Computation of group refractive index for light and near infrared waves at standard conditions and ambient conditions. Computation of RI for microwaves. Reference refractive index. Real time application of first velocity correction. Measurement of atmospheric parameters. Mean refractive index, Second velocity correction, Total atmospheric correction, Use of temperature and pressure transducers.
UNIT – IV ELECTROMAGNETIC DISTANCE MEASURING SYSTEM 10
Electro-optical system: Measuring principle ,Working principle, Sources of Error, Infrared and Laser EDM instruments. Microwave system: Measuring principle, Working principle, Sources of Error, Microwave EDM instruments. Comparison between Electro-optical and Microwave system. Total station and its applications. Care and maintenance of EDM instruments. Modern positioning systems.
UNIT – V FIELD WORK 30
Study of different EDM instruments and Total station. Setting out works, Base line Measurement, EDM traversing: observations and computation of area Trilateration.
TOTAL: 75 PERIODS
UNIT – I INTRODUCTION 8
History of cadastral survey – Types of survey – Tax – Real Property – Legal cadastre – Graphical and Numerical Cadastre.
UNIT – II CADASTRAL SURVEY METHODS 12
Steps in survey of a village – Instruments used for cadastral survey & mapping – Orthogonal, Polar survey methods – Boundary survey – Rectangulation – Calculation of area of Land.
UNIT – III CADASTRAL SURVEY MAINTENANCE 10
Resurveys – Measurement of sub-division – Measurement of obstructed lines – Survey of urban areas – Control requirement for urban survey
UNIT – IV MAPPING 5
Photogrammetry for cadastral surveying and mapping – Orthophoto map – GPS for cadastral survey.
UNIT – V CADASTRAL MAP REPRODUCTION 5
Map projection for cadastral maps – Convensional symbols – map – reproduction processes – Automated cadastral map.
UNIT – VI CADASTRAL OFFICES 5
LIS/GIS Organisation of cadastral offices in Tamil Nadu /India – Recent Developments & Modern Trends.
TOTAL: 45 PERIODS