Unit ADVANCED GEOMATIC TECHNIQUES

Course
Environmental engineering
Study-unit Code
A002614
Curriculum
Ambiente e energia
Teacher
Aurelio Stoppini
Teachers
  • Aurelio Stoppini
Hours
  • 48 ore - Aurelio Stoppini
CFU
6
Course Regulation
Coorte 2022
Offered
2022/23
Learning activities
Caratterizzante
Area
Ingegneria per l'ambiente e territorio
Academic discipline
ICAR/06
Type of study-unit
Obbligatorio (Required)
Type of learning activities
Attività formativa monodisciplinare
Language of instruction
Italian
Contents
GNSS positioning techniques. Post-processing and real time techniques. GNSS static and dynamic networks. Applications to Civil Engineering. Digital aerial photogrammetry. Deformation monitoring and testing of structures. Cadastre: mapping and updating with GNSS techniques.
Reference texts
Lecture notes by the teacher.
Cina, A.: Dal GPS al GNSS (Global Navigation Satellite System). Per la geomatica. Ed. CELID
Educational objectives
Knowledge of the main GNSS and terrestrial surveying techniques utilised in Civil Engineering with refer to desing, tracking of structures and infrastructures, machine control, monitoring of soil surface, diggings and structures, cadastre. Skill in designing and executing surveys for civil engineering
Prerequisites
Geodesy and surveying basis as developed in the course TOPOGRAFIA of the three years course of Civil Engineering
Teaching methods
Lessons integrated with a relevant practical activity
Other information
Due to the practical character of the module, lectures frequency is advisable
Learning verification modality
A single oral examination lasting about 30 minutes, aimed at verifying whether the Student has acquired the knowledge of the themes and methodologies involved by the course
Extended program
GNSS positioning techniques: GPS, GLONASS and GALILEO and their evolution. Characteristics and interoperability. Signals and observables. Modelling of biases (troposphere, ionosphere), multipaths, antenna calibration. GNSS methodologies: absolute, relative and differential positioning. Static and kinematic techniques. Post-processing and real time techniques. Utilization of GNSS static networks. Utilization of GNSS dynamic networks (permanent stations) and of positioning services. Applications of the GNSS techniques to Civil Engineering: survey of diggings, tracking of structures and infrastructures. Integration of GNSS and total station surveys.
Digital aerial photogrammetry: Fundamentals of photogrammetry: collinearity; coplanarity; internal, relative and absolute orientation; stereoscopic and monoscopic restitution. Photogrammetric flight planning and execution. Preliminary evaluation of the achievable accuracy. Photogrammetric triangulation. Digital photos and digitizing of analogical photos. Automatic correlation, orthoprojection, DTMs and DSMs. Practice on aerial digital photogrammetry, production of orthophotos and DTM/DSM.
Deformation monitoring: instruments (automatic high-accuracy total stations, digital levels). Selection of the most appropriate methodology for the type, size and velocity of the movements to control. Monitoring of structures, diggings, retaining walls, foundations. Determination of structure deformations for static tests on structures. Practice on deformation monitoring (simulating three-dimensional movements with a mechanical device) and structures testing.
Cadastral surveys: Organization of the terrain and urban cadastre in Italy. Cadastral maps, geodetic networks, fiducial points. Surveys for cadastral updating: the PREGEO software and the techniques admitted by the current rules. Use of GNSS techniques. Practice on cadastral updating with GNSS (real time kinematic).
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