Coordinates and Projection Systems

This lecture covers the geometric description of elements in a territory model, focusing on scales, coordinate systems, and projection systems. It explains the relationship between representation scale and spatial resolution, the process of transposing the Earth's spheroid onto a flat surface through two steps, and the different types of map projections. It also introduces the WGS84 global approximation system and locally adjusted ellipsoids for specific areas. The lecture concludes by discussing the three main families of projections, the legal reference provided by ellipsoids and projection systems, and the EPSG code for system description. For those interested in further exploring coordinate and projection systems, the instructor recommends the MOOC 'Geomatics Elements' mentioned in the lecture.