Datum coordination system for Great Toronto Area, Canada

Greeting:

I would like to know the appliable datum coordination system for Great Toronto Area
Input and output coordinate system: The WSG 84 default is used for input coordinate and NAD83(CSRS)/ UTM Zone 17N is used for output coordinate. I compared the XYZ value from the point cloud against from the Topo. There are not much difference for X and Y. But there is about 36m difference for the Z value.

Pix 4D Mapper datum coordinate system.pdf (809.7 KB)