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Bathythermograph Data, Lake Michigan, 1954

Metadata Updated: October 28, 2023

In 1954 researchers at the USGS Great Lakes Science Center conducted 11 research cruises on Lake Michigan during which 779 bathythermographs were cast to collect temperature profile data (temperature at depth). Bathythermographs of that era recorded water pressure and temperature data by mechanically etching them as a curve on a glass slide. Data was collected from the glass slide by projecting the image of the curve, superimposing a grid, and taking a photo of it, thereby creating a bathythermogram. Data collection personnel could then read the data from the curve. This USGS data release is a digitized set of those original bathythermogram print photos and the temperature and depth data the project team collected from them using the open-source software, Web Plot Digitizer, as well as metadata describing each. In addition, because of their historical value as well as potential future use, this data release includes the cruise logs, which include nautical and research notes beyond the logical scope of this data release.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date May 31, 2023
Metadata Updated Date October 28, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date May 31, 2023
Metadata Updated Date October 28, 2023
Publisher U.S. Geological Survey
Identifier USGS:580f8dc9e4b0f497e7960008
Data Last Modified 20200820
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id e1c77722-3e94-46b2-b59c-f7e729b2a2c5
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -87.8486,42.3694,-86.2681,44.0861
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 492202ae02cc6f31ece9d622bcb0738ea103432da08271e5eba5aeba9a6e5424
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -87.8486, 42.3694, -87.8486, 44.0861, -86.2681, 44.0861, -86.2681, 42.3694, -87.8486, 42.3694}

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