Elevation of CTs or DAs

Question

Is there any way to find out the average elevation (above sea level) of a census tract or dissemination area. I have a student who is trying to correlate socioeconomic status (from census
data) with elevation for our city. The thesis is that the higher up one lives in the physical sense, the higher their socioeconomic status. I think each census tract/dissemination area has a centroid which would have lat/long coordinates, but I don't think I have ever seen elevation data attached to this point. Any advice or help would be very much appreciated.

Answer

Statistics Canada does not have that information. Best we can provide is elevation of major lakes.
http://dissemination.statcan.ca/english/Pgdb/phys05.htm

NRCan is normally the place to go.

I also tried the infamous google search. I found a neat product called zipcode world that has that
information by postal code. You can demo the product but I'm not sure for how long. Here is what it looks like:
http://www.zipcodeworld.com/lookup.asp