to the depths of rivers and seas.

Hydrographic Surveys (LH) comprise a set of operations conducted in rivers, bars, coastal, and harbour areas to determine depths, by international recommendations (S-44). In addition to updating nautical charts - essential for the development of safe and efficient maritime transport systems - the information from LH is crucial for the development of bathymetric models with application in environmental, geophysical, and engineering studies. To determine the depths, SONAR, LiDAR, and/or RADAR and multispectral orbital platforms are used.