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These data are high-resolution bathymetry (riverbed elevation) in compressed LAS (*.laz) format, generated from the August 1–3, 2022, hydrographic survey of the Calumet River and Calumet Sag Channel in Cook County, Illinois. The survey extends from the junction with Lake Michigan in the northeast downstream to the junction with the Chicago Sanitary and Ship Canal in the southwest. Hydrographic data were collected using a high-resolution multibeam echosounder mapping system (MBMS), which consists of a multibeam echosounder (MBES) and an inertial navigation system (INS) mounted on a marine survey vessel. Data were collected as the vessel traversed the channel along overlapping longitudinal survey lines distributed...
    map background search result map search result map Calumet River and Calumet Sag Channel Bathymetry in Cook County, Illinois, August 2022 Calumet River and Calumet Sag Channel Bathymetry in Cook County, Illinois, August 2022