The role of the Geodetic Control Unit is to advance the provincial Canadian Spatial Reference System
(CSRS), and to maintain
and improve it as surveying and positioning technologies evolve.
This is done through the Alberta Survey Control (ASC) network, which serves as the provincial spatial
of the CSRS.
Geodetic Control Products
Coverage consists of a network of approximately 29,500 Alberta Survey Control Markers (ASCMs) throughout
Alberta, each distinguished
by a brass tablet stamped with an identifying number.
- Positional data consist of both horizontal and vertical coordinates, as well as further details about
the marker and its
relationship to other markers within a defined area.
- Survey Control Marker coordinates are published in geographical format (i.e., latitude and longitude).
- Coordinates are also available as Universal Transverse Mercator (UTM) and/or 3-degree Transverse Mercator
Below is a listing of the various products available through the Geodetic Control Unit.
Geodetic Product Details
Geodetic Fact Sheets
Alberta Survey Control (ASC) Product Manual
Guidelines for Alberta Survey Control Using GPS
ASCM Condition Report
ASCM Rural Index Maps
ASCM Urban Index Maps
Electronic Distance Measurement (EDM) Baseline Guidelines
NAD27 ASCM Listings
NAD83 (CSRS) Subset Data
Updated: Aug 25, 2015