We may have problems when it comes to fairness within the province. The net under-coverage is not the same in a rural riding, where it normally is quite small, as compared to a large metropolitan area such as Toronto. Obviously, there is going to be a net undercoverage discrepancy between these two locations. If we try to establish ridings with the same populations, the urban centre will be at a disadvantage.
In reality, there are no other options. There is no data available, but there is for the provinces and the territories.