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1		Bathymetry of Lake Erie and Lake Saint Clair () Date: Creator: National Geophysical Data Center (NGDC) Datum: Projection: Scale: Access: CD-ROM [122] Description: New bathymetry of Lake Erie and Lake Saint Clair 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. This project is a cooperative effort between scientists at the NOAA National Geophysical Data Center's Marine Geology and Geophysics Division (NGDC/MGG), the NOAA Great Lakes Environmental Research Laboratory (GLERL) and the Canadian Hydrographic Service (CHS). Metadata and Access Information
2		Bathymetry of Lake Michigan () Date: Creator: National Geophysical Data Center (NGDC) Datum: Projection: Scale: 1:250000 Access: CD-ROM [121] Description: New bathymetry of Lake Michigan 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. This bathymetry was compiled at a scale of 1:250,000, with a contour interval of 5 meters. This 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). Metadata and Access Information
3		Bathymetry of Lake Ontario G2 (1999) Date: 1999 Creator: National Geophysical Data Center (NGDC) Datum: WGS84 Projection: Geographic Scale: Access: CD-ROM [123] and web Description: The new bathymetry of Lake Ontario bathymetry was a collaborative effort between scientists at the NOAA National Geophysical Data Center (NGDC), the NOAA Great Lakes Environmental Research Laboratory (GLERL), the Canadian Hydrographic Service, and the University of Colorado Cooperative Institute for Research in Environmental Sciences (CIRES). DEM file for download is a composite of all files on DVD. Metadata and Access Information
4		Flow map showing movement of Lake Superior iron ores and of eastern and imported ores with locations of consuming furnaces for the year (1940) Date: 1940 Creator: Lake Superior Iron Ore Association Datum: Projection: Scale: 1:2,750,000 Access: web Description: Also see the following UTL catalogue record: click here Metadata and Access Information
5		General Chart of the Great Lakes 1st ed. (1927) Date: 1927 Creator: Canada Hydrographic Office Datum: Projection: Scale: 1:1 200 000 Access: web Description: Depths shown by contours and soundings. Shows cities and towns; boundaries; railways; principal sailing routes; insets: St. Lawrence River between Montreal and Quebec -- Rainy Lake and Lake of the Woods. Includes distance charts; elevation and dimension chart. Metadata and Access Information
6		Great Lakes Monthly Hydrologic Data (1860-1990) Date: 1860-1990 Creator: National Oceanic and Atmospheric Administration (NOAA) Datum: Projection: Scale: Access: web Description: Accurate hydrologic data (over-lake precipitation, runoff, lake evaporation, net basin supplies, connecting channel flows, diversion flows, beginning-of-month lake levels, and changes in storage) are required for simulation, forecasting, and water resource studies on the Laurentian Great Lakes and their basins. These data are derived from meteorological and hydrological data. The 1993 reference is an update of the earlier report describing Great Lakes monthly hydrologic data. It was expanded and revised to include all available data through 1990 and to reflect improved computational techniques. The raw data utilized were collected from several sources, so the periods of record for each lake vary. Metadata and Access Information
7		Great Lakes Water Level Data Retrieval Engine (current ongoing) Date: current ongoing Creator: National Oceanic and Atmospheric Administration (NOAA) Datum: Projection: Scale: Access: web Description: Metadata and Access Information
8		Map showing the principal transportation routes from the head of the Great Lakes via Montreal, New York to Liverpool (1901) Date: 1901 Creator: Compiled and drawn by L. A. Des Rosiers. Datum: Projection: Scale: ca. 1:1,785,000] Access: web Description: Includes: Table of distances of water and railway routes; table of distances of water routes; tables of canals on Canadian route; table of canals on United States route; table of sailing distances. Shows 5 railways: Canadian Pacific Railway; Canada Atlantic; Grand Trunk; Great Northern; Intercontinental. Shows canals and water routes. To accompany: Canada. Public Works Dept. Annual report, 1901 (Sessional paper, #19, 1902). Metadata and Access Information

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