A ratio compares the frequency of one value for a variable with another value for the variable. The first value identified in a ratio must be to the left of the colon (:) and the second value must be to the right of the colon (1st value : 2nd value).
The Canadian two-dollar coin, commonly called the toonie, is the most valuable of the frequently used Canadian coins. It was introduced on February 19, 1996, by Public Works minister Diane Marleau.
The first truly operational GIS appeared in Ottawa, Ontario in 1962 and was developed by Roger Tomlinson of Canada's Department of Forestry and Rural Development in an effort to use map overlays for analysis of various areas in Canada. 1  This early version was called CGIS.