Data

Natural Resources Canada's Canadian Geodetic Survey (CGS) offers data of the Canadian Active Control System (CACS), the Passive Control Networks and the Canadian Gravity Standardization Network (CGSN) as well as a series of geoid models.

Available data products include ACPs stations descriptions and locations, RINEX GNSS observations files, broadcast navigation messages and precise GNSS clock ephemerides as well as precise GNSS orbit and clock ephemerides in the NGS-SP3 format.

The Passive Control Networks include the Canadian Base Network (CBN) (NAD83(CSRS)), the High Precision 3D Geodetic Network (NAD83(CSRS)) as well as the vertical (CGVD28) and horizontal (NAD83) control networks. The Passive Control Networks provide data and stations descriptions of the 4 different networks.

The Canadian Gravity Standardization Net (CGSN) provides gravity data and gravimetric stations descriptions across Canada.

Canadian Active Control System (CACS)

The Canadian Active Control System (CACS) consists of unattended tracking stations, referred to as Active Control Points (ACPs), equipped with a high precision dual frequency GNSS receiver and an atomic frequency standard, which continuously record carrier phase and pseudorange measurements for all GNSS satellites within station view.

This interface allows users to download stations positions as well as GNSS data.

Download of Data Go to CACS

Station selection

The user can select stations by using:

  • The interactive "Map" tab by clicking on a station and its associated checkbox on the map
  • The "Stations List" tab by clicking checkboxes in the list

By clicking on the station's name, the Station Report will appear in a new tab.

Networks:

  • Permanent CACS tracking sites
  • Regional Active Control Sites
  • Western Canada Deformation Array
  • Nova Scotia Active Control Network

Download all stations positions

The Download section in the left menu provides the selected stations positioning information in CSV or KML formats.

GNSS Data Download

The Data Selection window, located below the interactive map, provides compressed files in the RINEX and NGS-SP3 formats.

From the "GNSS Options":

  • Select an observation interval: 1 second or 30 seconds
  • Define a start and end date: yyyy/mm/dd
  • Select a satellite system: GNSS, GPS only or GLONASS only
  • Select to obtain:
    • Precise ephemerides: (NAD83(CSRS) or ITRF) or None
    • Broadcast ephemerides: Yes or No
    • Clock Corrections: Yes or No
  • Select single or multiple stations

From the "Data Selection" window:

  • Click "Submit"

The download of GNSS data in zipped folders will begin.

Available files

Below is a complete list of all files and their extensions available for download from the Data Selection window.

  • RINEX observation data for GPS, GLONASS or GNSS satellites: *."yy"o
  • RINEX precise clock ephemerides for GPS, GLONASS or GNSS satellites: *.clk
  • RINEX GPS broadcast navigation messages: *."yy"n
  • RINEX GLONASS broadcast navigation messages: *."yy"g
  • NGS-SP3 precise orbit and clock ephemerides of GPS, GLONASS or GNSS satellites: *.sp3

Precise clock ephemerides files are stored in the .clk (clock RINEX) format, and contain the clock corrections data along with their standard deviations. Each file contains the clock corrections for the GPS (G01 to G32) and GLONASS (R01 to R24) satellites for a 24-hour period, with observations taken at intervals of 30 seconds that can be interpolated to intervals of 1 second, without degrading positioning accuracies.

Precise orbit and clock ephemerides contain X, Y and Z positions of the 32 GPS (G01 to G32) and 24 GLONASS (R01 to R24) satellites along with clock corrections data.

Station Report

For a chosen station, the CACS interface provides a Station Report including the following information:

  • Site Identification: name, province, unique number, provincial identifier
  • Station Coordinates: geographic, cartesian or UTM
    • The user can also choose the geoid model, reference frame and epoch
    • The horizontal and vertical velocities are calculated along with the ellipsoidal, orthometric and geoid heights.
  • Vertical Data: elevation, vertical datum, order, method, published year
  • Station marker description: marker type, date of inspection, status, comments
  • Station description

RTK Networks

Real-Time Kinematic (RTK) networks are operated both publically and privately in Canada and consist of continuously tracking GNSS receivers used for either Real-Time Network (RTN) or Single-base (RTK) solutions. To preserve a nationally consistent Geodetic infrastructure the Canadian Geodetic Survey (CGS) has entered into compliance agreements with interested private RTK network operators to integrate the coordinates of these RTK stations into the NAD83(CSRS) national standard.

The interface of the RTK Networks allows users to download stations positions and to view time-series results from private RTK networks which operate in Canada and have entered into a compliance agreement with the CGS. This includes the Cansel (Can-Net), Leica GeoSystems (SmartNet), and Topcon (TopNET) networks.

Download of Data Go to RTK Networks

Network selection

The user can select their desired RTK network by using the radio buttons in the left menu under "RTK networks". It is also possible to control the display of stations based on their "Compliance Status" using the check boxes in the left menu.

Station selection

The user can select stations by using:

  • The interactive "Map" tab by clicking on a station symbol which will cause a popup text box to appear. The user can click on either the Station Report or Time-Series Graphics which will appear in a new tab.
  • The "Stations List" tab by clicking on either the station name which will open the Station Report in a new tab, or the Time-Series Graphics which will open the Graph Report in a new tab.

Obtain all stations positions

The data tab in the left menu provides the selected stations positioning information in CSV or KML formats. For the GML or shapefile formats, go to the GeoGratis website.

Obtain station reports

The data tab also allows you to view the stations' report in a new tab.

Station Report

For a chosen station, the RTK interface provides a Station Report including the following information:

  • Site Identification: name, province, nts map sheet, unique number
  • Station Coordinates: geographic, cartesian or UTM
    • The user can also choose the geoid model, reference frame and epoch
    • The horizontal and vertical velocities are calculated along with the ellipsoidal, orthometric and geoid heights.
  • For more information (including station metadata) a link to the RTK network provider website is provided.

Graph Report

For a chosen station, the RTK interface provides a Graph Report which displays time-series of the differences between the adopted station coordinates at epoch 2010.0, and the weekly estimates from the CGS network solution propagated to this same epoch. These differences are displayed in the vertical, horizontal (2d vector), north, and east components with a single green circle or red triangle representing each weekly difference. A green circle represents weekly differences within the agreed upon tolerance (2cm horizontal/3cm vertical) whereas a red triangle represents weekly differences outside this agreed upon tolerance. The values can be displayed in graphical or tabular form by selecting either the Graph or Table tab.

Passive Control Networks

The interface of the Passive Control Networks provides access to stations descriptions from the Canadian Base Network (NAD83(CSRS)), the High Precision 3D Geodetic Network (NAD83(CSRS)), the Vertical (CGVD28) and Horizontal (NAD83) Control Networks.

Download of Data Go to Passive Control Networks

Station selection

The user can select stations by using:

  • The interactive "Map" tab by clicking on a station and its associated checkbox on the map
  • The "Stations List" tab by clicking the checkbox in the list

The user can also search a station through the "Network search" tool in the left menu.

They are 5 possible ways to define a search area:

  1. Search visible map area
    • The Zoom In and Out tool located in the top left of the interactive map will determine the visible map area
  2. Find a station
    • Search by Station Name or ID
  3. Network search
    • Search by NTS (National Topographic System) map sheet
    • Radial search (km)
      • Latitude, longitude and radius (km) required
    • Search by Geographic bounds
      • West, East, North and South boundaries required

By clicking on the station's name, the Station Report will appear in a new tab

Obtain all stations positions

The data tab in the left menu provides the selected stations positioning information in CSV or KML formats. For the GML or shapefile formats, go to the GeoGratis website.

Obtain station reports

The data tab also allows you to view the stations' report in a new tab.

Station Report

For a chosen station, the 4 networks will provide a Station Report including some of the following information, depending on the selected network:

  • Site Identification: name, province, nts map sheet, unique number, provincial identifier
  • Station Coordinates (1): geographic, cartesian or UTM
    • The user can also choose the geoid model, reference frame and epoch
    • The horizontal and vertical velocities are calculated along with the ellipsoidal, orthometric and geoid heights.
  • Horizontal data (2): latitude, longitude, horizontal datum, order, method, publication year, zone, easting (metres), northing (metres), scale, method
  • Vertical data: elevation (m), vertical datum, order, method, published year
  • Station marker's description: marker type, inspection date, status, inspection comments
  • Location: information on station's physical accessibility
  • Station description

Notes

  1. Station coordinates provided by the Canadian Base Network (CBN) and the High Precision 3D (NAD83(CSRS)) Geodetic Network
  2. Station coordinates provided by the Vertical (CGVD28) and Horizontal (NAD83) networks

Canadian Gravity Standardization Network (CGSN)

The Canadian Gravity Standardization Network (CGSN) is defined by more than 5,000 control stations systematically distributed throughout Canada. The adjustment of the CGSN is based on the International Gravity Standardization Net (IGSN71), therefore the datum definition is considered accurate to several tens of microgals.

Download of Data Go to CGSN

Station selection (see Station selection)

Download all stations positions (see Download all stations positions)

Station Report

For a chosen station, the Canadian Gravity Standardization Net (CGSN) will provide a Station Report containing the following information:

  • Site Identification: name, province, unique number, provincial identifier, description, last inspection date
  • Station Coordinates (Scaled): latitude, longitude, h (metres), gravity value
  • Station marker's description
  • Stations with the same name
  • Sketch, distant view and close view images of the station marker

Geoid Models

The list of geoid models available, along with statistics table, can be accessed through the Geoid Models webpage.