Bathymetry of Lake Ontario

Metadata Updated: February 8, 2018

Bathymetry of Lake Ontario has been compiled as a component of a NOAA project to rescue Great Lakes lake floor geological and geophysical data and make it more accessible to the public. The project is a cooperative effort between investigators at the NOAA National Geophysical Data Center's Marine Geology & Geophysics Division (NGDC/MGG) and the NOAA Great Lakes Environmental Research Laboratory (GLERL). was compiled utilizing the entire historic sounding data base. The entire historic hydrographic sounding data base from the U.S. and Canada, originally collected for nautical charting purposes, was used to create a complete and accurate representation of Lake Ontario bathymetry. The U.S. data primarily came from the NOS Hydrographic Survey Data. This and other bathymetric sounding data collected by the U.S. National Ocean Service's (NOS) Coast Survey and the U. S. Army Corps of Engineers was employed to construct bathymetric contours at 1 meter intervals from 1-10 meters depth and 2 meter intervals at depths greater than 10 meters. Compilation scales ranged from 1:10,000 to 1:50,000. Bathymetric sounding data collected by the Canadian Hydrographic Service (CHS) were employed to construct bathymetric contours at 1 meter intervals and compilation scales ranging from 1:1,000 to 1:30,000. Digitization of the bathymetric contours, merging of the bathymetric contour data sets, poster construction, and preparation of a CD-ROM, were accomplished at the NGDC. Multibeam bathymetric data collected by the University of New Brunswick's Ocean Mapping Group (UNB-OMG), with support of the Geological Survey of Canada (GSC) and the CHS, were kindly made available in gridded form. In the two areas where multibeam bathymetric data were available, no other bathymetric data were used in the compilations. In some areas all available Canadian and U. S. bathymetric sounding data, collected at different times on different survey expeditions, were used to derive the contours. The U.S. coastline used was primarily the GLERL Medium Resolution Vector Shoreline dataset (Lee, 1998). Where needed for more coverage, the NOS Medium Resolution Vector Shoreline for the Conterminous U.S. (1994) dataset was used. Coastlines from the CHS bathymetric sounding data field sheets were used to complete the Canadian coastline. Images were constructed using the publicly-available software Generic Mapping Tools (GMT).

Access & Use Information

Downloads & Resources


Metadata Date July 3, 2017
Metadata Created Date September 27, 2015
Metadata Updated Date February 8, 2018
Reference Date(s) January 1, 1999 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from NOAA CSW Harvest Source

Graphic Preview

Lake Ontario preview image

Additional Metadata

Resource Type Dataset
Metadata Date July 3, 2017
Metadata Created Date September 27, 2015
Metadata Updated Date February 8, 2018
Reference Date(s) January 1, 1999 (publication)
Responsible Party DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
Contact Email
Access Constraints Cite as: National Geophysical Data Center, 1999. Bathymetry of Lake Ontario. National Geophysical Data Center, NOAA. doi:10.7289/V56H4FBH [access date].
Bbox East Long -76.05
Bbox North Lat 44.25
Bbox South Lat 43.15
Bbox West Long -79.90
Coupled Resource
Frequency Of Update asNeeded
Graphic Preview Description Lake Ontario preview image
Graphic Preview File,43.15,-76.05,44.25&size=300,300&format=png32&interpolation=%20RSP_BilinearInterpolation&renderingRule=%7B%22rasterFunction%22:%22ColorHillshade%22%7D&f=image
Graphic Preview Type JPEG
Guid gov.noaa.ngdc.mgg.dem:282
Harvest Object Id f9aabbc2-6a6a-40c6-80d0-3d58c2b38764
Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
Harvest Source Title NOAA CSW Harvest Source
Licence Not to be used for navigation. Although these data are of high quality and useful for planning and modeling purposes, they are not suitable for navigation. For navigation, please refer to the NOS nautical chart series., Produced by the NOAA National Geophysical Data Center. Not subject to copyright protection within the United States., While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type ArcGIS Image Service
Spatial Reference System urn:ogc:def:crs:EPSG::4269
Spatial Harvester True

Didn't find what you're looking for? Suggest a dataset here.