The relationship among geodesy, photogrammetry, cartography, engineering surveying and oceanography

Geodesy is about the basic theoretical knowledge of surveying and mapping. Is the most basic thing.

Photogrammetry is a branch of surveying and mapping, focusing on the use of photography as a new technology for measurement. In fact, the aerial triangulation theory in geodesy is applied to the deformation of photogrammetry.

Cartography describes the theoretical methods of cartography in surveying and mapping.

Emphasis on engineering survey and engineering application. This is the concrete practice of geodesy theory.

Marine surveying and mapping is a branch of surveying and mapping discipline, which pays attention to the application of surveying and mapping technology theory in the specific marine background.

All subjects are the same, and each has its own emphasis.