| Title | Hydrographic vertical separation surfaces (HyVSEPs) for the tidal waters of Canada |
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| Author | Robin, C; Nudds, S; MacAulay, P; Godin, A; De Lange Boom, B; Bartlett, J |
| Source | Marine Geodesy vol. 39, no. 2, 2016 p. 195-222, https://doi.org/10.1080/01490419.2016.1160011 |
| Image |  |
| Year | 2016 |
| Alt Series | Earth Sciences Sector, Contribution Series 20150485 |
| Publisher | Informa UK Limited |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut; Canada |
| NTS | 1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65;
66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560 |
| Area | canada |
| Subjects | geophysics; marine geology; Nature and Environment; geodesy; satellite geodesy; hydrography; bathymetry; tides; modelling; models; oceanography; shorelines; water levels; global navigation satellite
systems (GNSS) |
| Illustrations | location maps; flow diagrams; sketch maps; histograms; models; tables; sections |
| Program | Geodetic Survey Canadian Spatial Reference System |
| Released | 2016 03 22 |
| Abstract | Since the advent of Global Navigation Satellite Systems, it has been possible to perform hydrographic survey reductions through the ellipsoid, which has the potential to simplify operations and improve
bathymetric products. This technique requires a spatially continuous separation surface connecting chart datum (CD) to a geodetic ellipsoid. The Canadian Hydrographic Service (CHS), with support from the Canadian Geodetic Survey, has developed a new
suite of such surfaces, termed Hydrographic Vertical Separations Surfaces, or HyVSEPs, for CD and seven tidal levels. They capture the spatial variability of the tidal datum and levels between tide gauges and offshore using semiempirical models
coupling observations at tide stations with relative sea-level rise estimates, dynamic ocean model solutions, satellite altimetry, and a geoid model. HyVSEPs are available for all tidal waters of Canada, covering over seven million square kilometers
of ocean and more than 200,000 kilometers of shoreline. This document provides an overview of the CHS's modeling approach, tools, methods, and procedures.
The HyVSEP for CD defines the new hydrographic datum for the tidal waters of Canada. HyVSEPs
for other tidal levels are fundamental for coastal studies, climate change adaptation and the definition of the Canadian shoreline and offshore boundaries. HyVSEPs for inland waters are not discussed. |
| Summary | (Plain Language Summary, not published)
NRCan is responsible for the Canadian Spatial Reference System, a national standard that enables high accuracy positioning and geodetic measurements of
the dynamic Earth, including the height reference system, enabling determination of heights above sea-level. This system forms the basis of a new marine geodetic height system managed by Fisheries and Oceans Canada, created as part of the Continuous
Vertical Datum for Canadian Waters (CVDCW) project, co-led by NRCan and DFO since 2011. The CVDCW brings a new paradigm for hydrography and marine geodesy in Canada. The introduction of Hydrographic Vertical Separation Surfaces (HyVSEPs) moves away
from a tide-gauge based marine height reference to a model-based one, which incorporates data from tide gauges, ocean models, geoid models, and satellite and GPS observations. It will align DFO systems (nautical charts and electronic navigation) with
the national system defined by NRCan, linking land- and sea-based measurements. |
| GEOSCAN ID | 297843 |
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