Tag Archives: canada

Weekly xyHt News Links: 4/7/17

Qinertia, a post-processing software to complete our offer for the surveying industry TCarta Marine to Introduce Gulf of Mexico Streaming Basemap Service and 2-Meter Bathymetric Data at Esri Petroleum Conference ClearEdge3D Releases VerityTM Construction Verification Software Tallysman introduces dual-band plus L-band GNSS antenna A look at NGS’ GPS on benchmarks program in Alaska Blue Marble Offers Free...

Northern Lights: GeoEd

Present-day technology has the ability to facilitate so many things that it’s sometimes hard to comprehend how fast it moves along. This is one of the reasons that professional associations across Canada (and the globe) have started to move towards mandatory professional development, but the challenge they face today is how to provide learning opportunities...

CGVD2013, Part 2

Above picture:  This color contour map shows the difference between CGVD2013 and NAVD 88, especially of interest to those who work on projects along the U.S./Canada border. In part 1 of this series in xyHt’s October issue, Canada’s new vertical datum is introduced—CGVD2013— with an overview of past Canadian datums, directions during the current transition...

Canada’s New Vertical Datum: CGVD2013

Geodesy Editor’s Note: The study of Earth’s gravity field is one of the most important aspects of physical geodesy. While seldom mentioned in land surveying text books or discussed at local surveying, mapping, or GIS conferences, it is nonetheless one of the most important issues that geospatial experts deal with on a daily basis.   Changing...

Future of Determining Elevation

A frank discussion of the different heights used in surveying, what’s inside a geoid model, and how geoid model data is used within GNSS software to produce elevations. Certainly most geospatial professionals who have used Global Navigation Satellite Systems (GNSS) within their surveying workflows have come across the term “geoid model” before. But who actually knows...