To find hydrology maps in the Map Collection, please use the Holdings binders located on the first row of map cabinets in Map Collection room. You can also use the library catalogue, but not all maps are currently catalogued in it. Hydrology maps are generally classifed using the subject code C. For example, hydrology maps of Canada are filed under G 3401 C3.
The Map Collection has various hydrographic charts as well. The Canadian hydrographic chart indexes are located on the Booklet shelf in the Map Collection.
The Atlas of Coasts and Oceans by 
World Atlas of the Oceans by 
The Great Lakes: an environmental atlas and resource book by 
Hydrological Atlas of Canada by 
