Lecture
This lecture covers the calculation of infinitesimal displacements on the Earth's surface using geomatics elements and spherical coordinates, focusing on the projection of points, meridians, equators, and longitudinal directions. The instructor demonstrates the step-by-step process with examples, such as determining the resulting distance and displacement for a point in the coordinate system. Practical applications in digital mapping, like determining displacements in specific locations such as Cameroon, are also discussed.