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Canadian Government

The Geologic Survey of Canada used to have their own section at with a subsection for gravity. Now the gravity data and GPS survey data are located under the NRCan Earth Sciences Geomatics


Natural Resources Canada

Geodetic Reference System main page

Geodetic Tools and Applications


The main use of this site is to extract survey control base station data for gravity and GPS. You want to tie in your survey to government control markers whenever possible.

Canadian Spacial Reference System (CSRS) main page

These two online tools allow you to export gravity and GPS station data for use in setting up control for your surveys.

The positional tool has a database selector so you can choose from various types of data:

  • Canadian Base Network NAD83(CSRS)
  • Vertical (CGVD2013 & CGVD28)
  • High Precision 3D Geodetic Network NAD83(CSRS)
  • Horizontal (NAD83)

Canada's Spatial Data Infrastructure main page

Geospacial Data Extraction (NRC)





Alberta Provincial Government

Free Data from AltaLis

AltaLis Provincial Boundary File

  • ATS v4.1, polygons and coordinates (NAD83)
  • Online tool, select and download

Small Scale Topographic Base Maps

  • 1:250k, NAD83, UTM Zones 11, 12
  • 1:1M, 1:2M, NAD83, 10TM Ref Mer 115
  • Township-Range Grid
  • Hydrography
  • Transportation
  • Administrative Boundaries
  • NAD83 Datum

Municipal Boundary Data

  • SHP format in Geographic projection (lat and long)
  • NAD83 Datum, +/- 3m accuracy
  • See specifications tab on page for details

Terrain Data - 1:20k DEM data

  • 3D Coordinate Data in ASCII and GIS Formats
  • The open 1:20 000 DEM is available in an ASCII format with a 10TM projection (reference meridian of 115, 500000 Easting), also referred to as “NAD_1983_10TM_AEP_Forest”.




AltaLIS Logo

Maps, Survey and Topo Data for New Brunswick

High Precision Control Network (HPCN)

DEM Data Tiles

  • 1:10,000 mapsheets, 70 m avg point spacing






The New GeoNB website

The New GeoNB websit - data catalogue


Service New Brunswick

1:10,000 topo tiles

US Government

National Geospacial Agency Publications

National Geodetic Survey - Software downloads


Latest Earthquake Activity

Seamless Elevation Data


NASA Shuttle Radar Topographic Mission

SRTM 3-arc second elevations (90 m spacing) - interactive

  • SRTM Version 4, from 2008
  • The CGIAR-CSI GeoPortal is able to provide SRTM 90m Digital Elevation Data for the entire world. The SRTM digital elevation data, produced by NASA originally, is a major breakthrough in digital mapping of the world, and provides a major advance in the accessibility of high quality elevation data for large portions of the tropics and other areas of the developing world. The SRTM digital elevation data provided on this site has been processed to fill data voids, and to facilitate it's ease of use by a wide group of potential users. This data is provided in an effort to promote the use of geospatial science and applications for sustainable development and resource conservation in the developing world. Digital elevation models (DEM) for the entire globe, covering all of the countries of the world, are available for download on this site. The SRTM 90m DEM's have a resolution of 90m at the equator, and are provided in mosaiced 5 deg x 5 deg tiles for easy download and use. All are produced from a seamless dataset to allow easy mosaicing. These are available in both ArcInfo ASCII and GeoTiff format to facilitate their ease of use in a variety of image processing and GIS applications. Data can be downloaded using a browser or accessed directly from the ftp site.

courtesy of NGA








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Last Modified on Sat 15-Oct-2016

Geo Tagged for Geographic Discovery