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...

This document describes the contents of an excel format spreadsheet for 32,971 published ASCMs. The coordinate and elevation information for these ASCMs are based on the NAD83V7.0.0.AB.1 provincial readjustment of the Alberta Survey Control network. As a result, the geographic coordinate data is...

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...

Geodetic Control publishes coordinate data with respect the North American Datum of 1927 (NAD27) and the North American Datum of 1983 (NAD83). The NAD83 coordinate data is further broken down into coordinate data relative to the original implementation of NAD83 (NAD83(Original)) and the Canadian...

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...