Geoids, provided here for your convenience, must be in WPG format to be used with Waypoint software. The Waypoint Products Group, NovAtel Inc, and any of its distributors will not accept any liability for any errors in the geoids' accuracy or implementation. If the user is unsure of the results being produced, results should be checked against government programs that perform similar tasks. Most can be checked via the Internet. For more information on the use of Geoids within the Waypoint software please see our Geoids FAQ.
The Canadian geoid data files are now freely available here, thanks to the Geodetic Survey Division of Geomatics Canada, Natural Resources Canada. Please note that these files are copyright 2001, Her Majesty the Queen in Right of Canada. Natural Resources Canada, Geodetic Survey Division. All rights reserved. No Warranty. These digital files are provided on an "as is" basis and Canada makes no guarantees, representations or warranties respecting these files, either expressed or implied, arising by law or otherwise, including but not limited to, effectiveness, completeness, accuracy or fitness for a particular purpose. Any use whatsoever of these digital files shall constitute acceptance of all terms and conditions detailed in the license included with the product documentation.
For more information on all Canadian geoids please see http://webapp.geod.nrcan.gc.ca/geod/data-donnees/geoid.php
Canadian Geodetic Vertical Datum of 2013 (CGVD2013)
Canadian Geodetic Vertical Datum of 1928 (CGVD28)
CGVD28 is the former vertical datum for Canada. It was replaced by CGVD2013 as of November 2013. However, CGVD28 will co-exist with CGVD2013 during the transition period.
HTv2.0 (Height Transformation version 2.0) is a hybrid geoid model compatible with CGVD28. It is a distorted geoid model to fit as well as possible with the CGVD28 benchmarks published elevations. HTv2.0 is based on CGG2000. A NAD83(CSRS) version is available for download in WPG format.
Metro Vancouver Geoid
HTMVBC000_Abb.zip is a precise geoid model that covers all of Metro Vancouver, Abbotsford and east to Hope. Please see http://geobc.gov.bc.ca/base-mapping/atlas/gsr/downloads/index.html for more information.
Superseded Gravimetric Geoid Models
This geoid model is not compatible with either CGVD2013 or CGVD28. A NAD83(CSRS) version is available for download in WPG format.
Mexico97 is available but please see http://www.ngs.noaa.gov/GEOID/MEXICO97/ for more information as this geoid is not suitable for direct conversion between NAD83 GPS ellipsoid heights and NAVD88 orthometric heights. It is therefore suggested that this geoid be used in a relative sense as much as possible (i.e. by using orthometric heights at your base station).
CARIB97 is available but please see http://www.ngs.noaa.gov/GEOID/CARIB97/ for more information as this geoid is not suitable for direct conversion between NAD83 GPS ellipsoid heights and NAVD88 orthometric heights. It is therefore suggested that this geoid be used in a relative sense as much as possible (i.e. by using orthometric heights at your base station).
Great Britain and Ireland
OSGM02 is available for Great Britain and Ireland, please see
http://www.ordnancesurvey.co.uk/business-and-government/help-and-support/navigation-technology/os-net/surveying.html for more information.
JGeoid96 was produced using the DAT files provided by GSI. Because WGS84 has shifted over time, this geoid is best used in a relative fashion.
The FIN2000 geoid model can be used to transform ETRS89 ellipsoidal heights to the Finnish N60 height system. Although the model goes over Finish borders, users are advised not to use the model outside Finland because of rapidly increasing errors. For more information please see http://coordtrans.fgi.fi/.
The FIN2005 geoid model can be used to transform ETRS89 ellipsoidal heights to the Finnish N2000 height system. Although the model goes over the Finish boards, users are advised not to use the model outside Finland because of rapidly increasing errors. For more information please see http://coordtrans.fgi.fi/.
The Waypoint Product Group provides a collection of geoid utilities which are used to create WPG files from known ASCII or binary file formats. Please see section 8 of our Geoids FAQ for more information.