The province of Prince Edward Island has always been pretty good and open about making their PEI aerial photography freely available. You can download scanned Aerial Photography dating back to 1935 ...
City of Saint John Map Viewer
1967 is a very significant date in Saint John’s history. It was the year that the City of Saint John was amalgamated with the neighboring City of Lancaster, Parish of Lancaster and Parish of Simonds.
As a result of amalgamation, the City’s area grew from 54km2 to 366km2.
Sliding the center bar left and right will allow you to see how much the City has changed since 1967.
The City of Regina Open Data website provides the public with "self-serve" access to city data/information for download or viewing in different formats. Members of the public can access the information to do data analysis, mapping, chart creation or develop applications.