Do I need a visa or airport transit visa to get to Alberta, Canada?
Us citizens do not require a visa to visit Canada, as long as it is for tourism, and for less than 180 days. However, if you have a criminal record, you do need to apply for an approval for rehabilitation. As for a transit visa, I dont see how that could apply - unless you are travelling to Canada via a third country. The website you linked to is a New Zealand site, so is hardly relevant to Canada.