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TitleThe Canadian hydrographic continuous vertical datum: methodology and accuracy
AuthorRobin, C; Godin, A; MacAulay, P; de Lange Boom, B; Lefaivre, D; Herron, T; Sinnott, D; Ballantyne, A; Maltais, L; Véronneau, M
SourceThe arctic old challenges new approaches, Canadian Hydrographic Association 2012 conference papers; 2012 p. 1-15
LinksOnline - En ligne
Alt SeriesEarth Sciences Sector, Contribution Series 20120072
MeetingCanadian Hydrographic Conference; Niagara Falls; CA; May 15-17, 2012
Mediaon-line; digital
File formatpdf
Subjectsgeophysics; hydrogeology; remote sensing; satellite geodesy; hydrography; models; global positioning system
Illustrationsplots; cross-sections
ProgramGeodetic Survey, Canadian Spatial Reference System
The Canadian Hydrographic Service (CHS) has developed a program to build a separation model (SEP) which seamlessly maps the height of chart datum (CD) above the GRS80 ellipsoid in the NAD83(CSRS) reference frame over all Canadian waters, making this product compatible with spatial positio ning technique (e.g., GPS). The Canadian Geodetic Survey is providing important support to the completion of this program. An accurate separation model will improve on existing local SEP’s by incorporating data from ocean models and/or satellite altimetr y. Unlike similar programs in other countries, the Canadian seamless datum is managed us ing a top-down approach, with 4 regional models covering all Canadian waters, and is constrained by relatively few observations due to the large size and inacce ssibility of the territory. In this paper, we demonstrate a procedure for calculating a seamless CD, and ex
amine preliminary results for the Gulf of St. Lawrence.