Government of Alberta

In order to facilitate user needs working with coordinate data referenced to different reference frames, Geodetic Control has developed transformation grids to allow users to accurately transform 2-dimensional coordinate data from one reference frame to another. This fact sheet reviews the two...

Alberta Survey Control Marker (ASCM) data is available for three reference frames: The North American Datum of 1927 (NAD27), the original derivation of the North American Datum of 1983 (NAD83(Original)), and the Canadian Spatial Reference System (CSRS) derivation of NAD83 (NAD83(CSRS)). This fact...

The National Transformation Analysis Data tables allows land surveyors, engineers and others to gain insight into the quality of transformation grids that allow them to transformation coordinate data from NAD27 to NAD83(Original) and vice-versa, NAD83(Original) to NAD83(CSRS) Epoch 2002 and...