Colour aerial ortho photographs of The City are based on the Alberta Township Survey (ATS) sections. Photos may be used for personal or reference purposes, but may not be republished.
The 2017 orthophotos cover The City of Calgary plus a minimum of one mile beyond the city limits. As a result some sections beyond the city limits may be partial sections.
If you do not already have a program that can open MrSID format files, see GeoViewer by LizardTech.