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Course Sheet Academic Year of enrolment:
Disciplinary Sector:
Topography and Cartography
Professor and Collaborators:
Hours of classroom activity:
Prerequisites:
Knowledge of the basics of mathematics, geometry and drawing.
Objectives
Contents The course content covers the acquisition, restitution, analysis and management of data of a metric or thematic nature relating to the Earth's surface, or portions thereof, including the urban environment, infrastructure and architectural heritage, identified by their spatial location and qualified by the accuracy of the survey. In particular, it addresses the following topics:
- Definitions of reference surfaces;
- The representation of the ellipsoid on the plane and cartographic information system;
- The formation process of numerical cartography and modern acquisition systems;
- Digital models of the real world;
- GIS (Geographic Information System);
- Elements of theoretical topography, planimetric and altimetric surveys;
- Processing of measurements.
Extended Syllabus Definitions of reference surfaces - The geoid; approximate solutions of the geoid: spheroid and rotation ellipsoid; the terrestrial ellipsoid; geographic coordinates, deviation of the vertical, geodetic DATUMs: local and global; DATUM transformations.
The representation of the ellipsoid on the plane and cartographic information system - The general problem of cartographic representations; the linear, surface and angular deformation modulus; the classes of cartographic representations; the map scale; equivalent representations; conform: the Mercator projection, the polar stereographic projection, the Gauss projection; the Cassini-Soldner projection and the Cadastre map; the cartographic information system, elementary notions of cartographic drawing, representation of altimetry, conventional signs and legend; official Italian cartography.
GNSS - Generalities; principles of GNSS satellite measurements: pseudo-range equations and phase miusre; post-processing and real-time positioning; use of static and dynamic GNSS networks.
The process of building digital cartography and modern acquisition systems - Passive sensors (frame cameras, oblique cameras) and active sensors (ALS - Airborne Laser Scanning) mounted on an aerial platform; acquisition with high-resolution optical satellite sensors: types of platforms, pan-sharpening techniques and algorithms.
Digital models of the real world - Characteristics and construction methods of digital terrain models (DTM, Digital Terrain Model); TIN (Triangulated Irregular Network); DEM (Digital Elevation Model); DSM (Digital Surface Model); Interpolation methods: nearest neighbour, Kriking, Spline, IDW (Inverse Distance Weight) and collocation; Primitive 3D: Tetrahedra, Polyhedra, B-Splines, NURBS.
GIS (Geographic Information System) - Constituent characteristics and organisation of data, the hardware and software components of a GIS; organisation of cartographic data; databases and management systems (relational and object model); GIS functions: querying GIS databases using SQL (Structured Query Language); spatial vector analysis; organisation of layouts; construction of thematic maps; Georeferencing of raster and vector files through conformal and affine transformations; sharing GIS on the Internet (WebGIS).
Elements of theoretical topography, planimetric and altimetric surveying - The topographic plane, simple and complex measuring instruments: the total station, the level; planimetric surveying: triangulations, intersections and traverses (open and closed); altimetric surveying: levellings and classification of levellings; the dimensioned plane.
Measurement processing - generalities; direct and indirect measurements; error distribution; precision and accuracy; the least squares principle; linearisation of observation equations.
Recommended Bibliography Lecture notes provided by the lecturer
Further reading:
Barzaghi, R., Pinto, L., & Pagliari, D. (2018). Elementi di topografia e trattamento delle osservazioni. Cittàstudi.
Folloni, G. (1982). Principi di topografia. Pàtron.
Shan, J., & Toth, C. K. (2018). Topographic laser ranging and scanning: principles and processing. CRC press.
Borrough P.A. (1986): Principles of geographical information systems for land resources assesment, Oxford University Press.
Fondelli, M. (1992). Trattato di fotogrammetria urbana e architettonica.
Teaching Methods The course comprises lectures and exercises.
Evaluation methods Verification of learning:
Oral examination of the topics covered in the lecture, including the elaboration and discussion of some case studies.
In order to pass the examination, the student must demonstrate, also through the elaboration and discussion of case studies, that he/she is familiar with the theoretical and technical fundamentals of the discipline, methods of analysis and tools for topo-cartographic and GIS surveying.