Calumet River and Calumet Sag Channel Bathymetry in Cook County, Illinois, August 2022

Dates

Publication Date: 2023-07-11
Start Date: 2022-08-01
End Date: 2022-08-03

Citation

Huizinga, R.J., and LeRoy, J.Z., 2023, Calumet River and Calumet Sag Channel bathymetry in Cook County, Illinois, August 2022: U.S. Geological Survey data release, https://doi.org/10.5066/P9IHEF25.

Summary

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 throughout the reach. [...]

Summary

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 throughout the reach. Data collection software integrated and stored the depth data from the MBES and the horizontal and vertical position and attitude data of the vessel from the INS in real time. Data processing required specialized computer software to extract bathymetry data from the raw data files and to summarize and map the information.

The full-resolution data are provided in American Society for Photogrammetry and Remote Sensing (ASPRS) compressed LAS format as CalSagChannel_bathymetry_2022-08_fullres.laz. This bathymetry dataset is the full-resolution, near-raw data output from the processing software. This dataset has undergone limited cleanup and editing to remove obvious stray data, but data editing was minimized to retain detail. Furthermore, this dataset is large, and may not be readily viewable without specialized software.

The reduced-resolution data also are provided in ASPRS compressed LAS format as CalSagChannel_bathymetry_2022-08.laz. This bathymetry dataset is a subset of the full-resolution data in the CalSagChannel_bathymetry_2022-08_fullres.laz file, reduced to a nominal 0.5-meter point spacing.

The compressed LAS format is a standardized binary format for storing 3-dimensional point cloud data and point attributes along with header information and variable length records specific to the data. Data points are stored as a 3-dimensional data cloud as a series of x (longitude), y (latitude), and z (elevation) points. Please refer to http://www.asprs.org/Committee-General/LASer-LAS-File-Format-Exchange-Activities.html for additional information.

Contacts

Point of Contact :: Central Midwest Water Science Center
Originator :: Richard J Huizinga, Jessica Z LeRoy
Metadata Contact :: Richard J Huizinga
Publisher :: U.S. Geological Survey
SDC Data Owner :: Central Midwest Water Science Center
USGS Mission Area :: Water Resources
Distributor :: U.S. Geological Survey - ScienceBase

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CalSagChannel_bathymetry_2022-08.xml Original FGDC Metadata	View	28.56 KB	application/fgdc+xml
CalSagChannel_bathymetry_2022-08.jpg “Part of Calumet River near T.J. O'Brien Lock in Cook County, IL”		169.78 KB	image/jpeg
CalSagChannel_bathymetry_2022-08.laz “Reduced resolution dataset”		62.29 MB	application/unknown
CalSagChannel_bathymetry_2022-08_fullres.laz “Full resolution dataset. WARNING: LARGE FILE”		593.03 MB	application/unknown

Related External Resources

Type: Citation

LASER (LAS) FILE FORMAT EXCHANGE ACTIVITIES	http://www.asprs.org/Committee-General/LASer-LAS-File-Format-Exchange-Activities.html

Purpose

Hydrographic data were collected along planned survey lines within the study area to capture the hydraulic and morphologic characteristics of the river. These data are intended for science researchers, policy makers, and hydraulic engineers interested in assessing the condition of the channel bed.

Calumet River and Calumet Sag Channel Bathymetry in Cook County, Illinois, August 2022

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