Government of Alberta

The Persons with Developmental Disabilities (PDD) program provides services to help adults with developmental disabilities live as independently as possible in their communities. This historical data asset tracks the number of Albertans across the province who were eligible for the PDD program...

The Canadian Spatial Reference System (CSRS) derivation of the North American Datum 1983 (NAD83) was first implemented for Alberta Survey Control Markers (ASCMs) in 1999. Since then, Alberta has undertaken three provincial readjustments of the Alberta Survey Control network culminating in the...

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...

This fact sheet discusses the 3TM and UTM mapping planes and their representation on Alberta Survey Control Marker (ASCM) ID cards and for plans of survey.

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...

Alberta Survey Control Marker (ASCM) index maps are a graphical representation of the provincial spatial referencing system. The index maps display the location of integrated ASCMs in relation to various base mapping features including the Alberta Township System, hydrography, geo-administrative...

This Fact Sheet presents a brief overview of provincial readjustments of the Alberta Survey Control network as well as national (cross-Canada) readjustments that define the reference frame in Canada (and Alberta). It is important to note that with the advancement of least squares adjustment...

In Alberta there are two official vertical datums; The Canadian Geodetic Vertical Datum of 2013 (CGVD2013) and the Canadian Geodetic Vertical Datum of 1928 (CGVD28). This fact sheet describes both datums and their implementation in Alberta.

This document describes the transformation grids available in Alberta to transform coordinate data from one geometric reference frame to another and vice-versa as well as data analysis results for each transformation grid. This document supersedes the README.doc file produced by the Geodetic...

This fact sheet discusses the history of the survey control in Alberta including the development of the Alberta Survey Control (ASC) network, surveying infrastructure, the Spatial Reference Design Alternatives initiative, development of the provincial High Precision Network, and the future of...

The Canadian Base Network (CBN) is a network of forced-centring pillars, which serve as the ground segment of monumented control of the Canadian Spatial Referencing System (CSRS). This network provides the link between the existing spatial referencing framework within the province of Alberta and...

This fact sheet discusses Grid Bearings and Astronomic Azimuths and their representation on Alberta Survey Control Marker (ASCM) ID cards.