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Bathymetry of Lake Ontario

Entry ID: gov.noaa.ngdc.mgg.dem.282

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Summary

Abstract: ABSTRACT: 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).

SUPPLEMENTAL INFORMATION: Supplemental information regarding spatial reference. Contours are vertically referenced to lake levels. Gridded data is vertically referenced to lake level or sea level as set by user in online tool "Design-a-Grid" advanced options.

CURRENTNESS REFERENCE: publication date

SPATIAL REFERENCE INFORMATION - GEODETIC MODEL
Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257222

Fees: Download online no charge. CD-ROM: 25 USD plus shipping and handling. USD plus shipping and handling

Purpose: PURPOSE: Scientific Research, Commercial Exploration, Fishing, Policy and Decision-making

Related URL

Link: GET DATA

Description: Download page for accessing contour data

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: 44.25

S: 43.15

E: -76.05

W: -79.9

Data Set Citation

Dataset Originator/Creator: National Geophysical Data CenterNOAA Great Lakes Environmental Research LabNOAA National Ocean ServiceCanadian Hydrographic Service

Dataset Title: Bathymetry of Lake Ontario

Dataset Release Date: 1999

Dataset Release Place: Boulder, CO

Dataset Publisher: National Geophysical Data Center

Version: First

Online Resource: http://www.ngdc.noaa.gov/mgg/greatlakes/ontario.html

Temporal Coverage

Start Date: 1999-01-01

Location Keywords

CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > GREAT LAKES

Data Resolution

Latitude Resolution: 0.000833
Decimal degrees
Longitude Resolution: 0.000833
Decimal degrees

Science Keywords

TERRESTRIAL HYDROSPHERE > SURFACE WATER > LAKES

TERRESTRIAL HYDROSPHERE > SURFACE WATER > WATER CHANNELS

ISO Topic Category

BIOTA

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

GEOSCIENTIFIC INFORMATION

Ancillary Keywords

UV-B

Data Center

Department of Plant Biology, School of Life Sciences, Arizona State University

Data Center URL: http://www.nsf.gov/od/opp/antarct/ajus/nsf9828/9828html/i10.htm

Data Center Personnel
Name: THOMAS A. DAY Phone: 480-965-8165 Fax: 480-965-6899 Email: tadday at asu.edu Contact Address: Department of Plant Biology Life Sciences E-218 PO Box 871601 Arizona State University City: Tempe Province or State: AZ Postal Code: 85287-1601 Country: USA

Personnel

THOMAS A. DAY

Role: DIF AUTHOR

Phone: 480-965-8165

Fax: 480-965-6899

Email: tadday at asu.edu

Contact Address:

Department of Plant Biology

Life Sciences E-218

PO Box 871601

Arizona State University

City: Tempe

Province or State: AZ

Postal Code: 85287-1601

Country: USA

Publications/References

Grobe, CW, CT Ruhland & TA Day. 1997. A new population of the
vascular plant Colobanthus quitensis (Kunth) Bartl. at Arthur Harbor,
Antarctic Peninsula: correlating recruitment with warmer summer air
temperatures. Arctic and Alpine Research 29:217-221.

McGraw, JB & TA Day. 1997. Size and characterization of ...

Creation and Review Dates

DIF Creation Date: 2002-05-09

Last DIF Revision Date: 2010-07-02

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