🌐EnglishEnglishDeutschEspañolFrançaisNederlandsPortuguêsSvenskaTürkçeРусскийالعربيةहिन्दी中文日本語EntityQ1520887· pop 10· linked from 1,696 articleshydrographic surveyanalysis of the topography of bodies of water, providing data for environmental, tidal calculations, maritime navigation, etc.ConnectionsbathymetryEntityecho soundingEntityCategoriesDuplicate articlesField surveysHydrographySurveying