# Geodesy (surveying)

## Course Description:

• Introduction, subject and purpose of surveying.
• Basic concepts (reference surfaces and coordinate systems, measured quantities, maps and topographic plans).
• Planar Cartesian coordinate reference systems, fundamental problems.
• Distance measurements (tapes and EDM, measuring methods, calculations, corrections and reductions).
• Direction – Angle measurements (total stations, measuring methods, calculations).
• Height differences measurements, levelling, types of heights (measuring methods of height differences, instruments, optical and digital levels, calculations). -Site survey, plan drawing, stake out construction, Hellenic Geodetic Reference System 1987 -Global Navigation Satellite System, basic principles, methodology, observations analysis Exercises and problems are given on all the above topics.

### Prerequisite Knowledge

Knowledge of some subjects on Geometry, Trigonometry, Algebra

### Course Units

# Title Description Hours
1 Introduction – Reference surfaces Introduction-History- reference surfaces (Geoid ,Ellipsoid, sphere, plane)- Reference coordinate Systems (Χ,Υ,Ζ –φ,λ,h - Φ,Λ,Η – x,y,z ) 1Χ4=4
2 Funtamental definitions Basic definitions – Triangle geometry – measurement units 2Χ4=8
3 Distances and directions measurements Basic principles for the distances and directions measurement –Instrumentation 1Χ4=4
4 Laboratory of Instruments Ι Total stations 1Χ4=4
5 Measurements of heights Basic principles- measurement methods (spirit leveling, trigonometric leveling)- Instrumentation 1Χ4=4
6 Laboratory of Instruments ΙΙ Optical and digital Levels 1Χ4=4
7 Stake out of constructions The methodology of stake out constructions by conventional and CNSS systems 1Χ4=4
8 Laboratory of Instruments ΙΙΙ GNSS receivers 1Χ4=4
9 HGRS ‘87 Definition of the Hellenic Geodetic Reference System 1987, presentation of its applications 1Χ4=4
10 Site Survey General principles – Methodology –Calculation – Accuracy 2Χ4=8
11 Plan drawing Methodology of plan drawing, appropriate references. 1Χ4=4

### Learning Objectives

The course provide knowledge on: The fundamental principles of measurement and calculations of the points coordinates(x, y, H) The use and usefulness of the geodetic measurements and the properties plan drawing. All the modern methods which are used for the documentation and the Stake out of constructions The use of modern geodetic instrumentation (total stations, levels, GNSS receivers)

### Teaching Methods

 Teaching methods Lectures in the classroom, Discussion of applied subjects (case studies), Calculations, reviews and questions discussion. Power Point presentations. Calculations in the classroom. The students solve simple exercises with the teachers supervision using portable PCs in the classroom. About 10 calculation exercises

### Student Assessment

• Final written exam: 70%
• Problems - Applications: 30%

### Textbooks - Bibliography

1. Ε. Λάμπρου, Γ. Πανταζής (2010). Εφαρμοσμένη Γεωδαισία. Εκδόσεις Ζήτη
2. Γ. Γεωργόπουλος (2017). Μαθήματα Γεωδαισίας. Εκδόσεις Τζιόλα
3. Σημειώσεις μαθήματος….

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