File:Lake Ontario bathymetry map.png

Summary

DescriptionLake Ontario bathymetry map.png	Lake Ontario bathymetric shaded relief map contoured with interval 20 m (100 m with thicker lines). The deepest point is marked with "×". For land the vertical datum is sea level, for bathymetry low water datum of the lake. The map was created using the Generic Mapping Tools, GMT, version 5.1.1.
Date	19 April 2015
Source	Own work using: the following Public Domain datasets (grids): Great Lakes Bathymetry from National Geophysical Data Center http://www.ngdc.noaa.gov/mgg/greatlakes/greatlakes.html. Credits: National Geophysical Data Center, 1999. Bathymetry of Lake Ontario. National Geophysical Data Center, NOAA. doi:10.7289/V56H4FBH [access date: 2015-03-23]. National Geophysical Data Center, 1999. Bathymetry of Lake Erie and Lake Saint Clair. National Geophysical Data Center, NOAA. doi:10.7289/V5KS6PHK [access date: 2015-03-23]. (only small portion of this map) GLOBE http://www.ngdc.noaa.gov/mgg/topo/gltiles.html - land part of this map. Credits: National Geophysical Data Center, 1999. Global Land One-kilometer Base Elevation (GLOBE) v.1. Hastings, D. and P.K. Dunbar. National Geophysical Data Center, NOAA. doi:10.7289/V52R3PMS [access date: 2015-03-16]. The coordinates of deepest point are taken from the NOAA Great LakesEnvironmental Research Laboratory webpage (www.glerl.noaa.gov/, kml file Google Earth Great Lakes Tour). The color palette of the depth scale was made to be more or less similar to the color palettes used on the NGDC Lake Ontario maps. This map was created with GMT.
Author	Darekk2 using the Great Lakes Bathymetry and GLOBE tiles
Other versions	The same map but not shaded: Lake Ontario bathymetry map 2.png

Licensing

Attribution (in addition to the author of this map):
The NGDC in it's copyright notice says:
As required by 17 U.S.C. 403, third parties producing copyrighted works consisting predominantly of the material produced by U.S. government agencies must provide notice with such work(s) identifying the U.S. Government material incorporated and stating that such material is not subject to copyright protection within the United States. (...)
(for credits see the Source section).

This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.

Attribution: The author of the work
and Great Lakes Bathymetry and GLOBE
(see above and the Source section)

You are free:

to share – to copy, distribute and transmit the work
to remix – to adapt the work

Under the following conditions:

attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

	Date/Time	Thumbnail	Dimensions	User	Comment
current	10:42, 19 April 2015		1,024 × 656 (750 KB)	Darekk2	changed contour interval from 25 to 20 m because some lines were missing
	10:08, 19 April 2015		1,024 × 656 (744 KB)	Darekk2	User created page with UploadWizard

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