Results 71 to 80 of about 5,019 (198)

The Canadian Geodetic Vertical Datum of 2013 (CGVD2013)

Geomatica, 2016
The Canadian Geodetic Vertical Datum of 2013 (CGVD2013) is the first major update to the vertical datum in Canada in almost 100 years. Canada is not only moving to a new vertical datum, but it is also using a modernized approach to realize it. The modernization of the height reference system is necessary to make it compatible with Global Navigation ...
Marc Véronneau, Jianliang Huang
openaire   +1 more source

Outcrop and subsurface characterisation of a mixed tidal and wave‐influenced coastline (Triassic Red Beds, SE Spain)

Sedimentology, EarlyView.
ABSTRACT Paralic depositional systems are complex and heterogeneous sedimentary environments, presenting challenges for predicting reservoir architecture and connectivity. Their stratigraphic and facies variability arises from the dynamic interplay between fluvial, tidal and wave processes, and their sensitivity to sea‐level fluctuations, sediment ...
Luis Miguel Yeste, Marc Gil‐Ortiz, Neil David McDougall, Patricia Cabello, César Viseras   +4 more
wiley   +1 more source

WAVE EQUATION DATUMING TO CORRECT TOPOGRAPHY EFFECT ON FOOTHILL SEISMIC DATA

Earth Sciences Research Journal, 2005
The current seismic processing applies Static Corrections to overcome the effects associated to rough topography, based in the assumption that velocity in near surface is lower than in the substratum, which force going up rays travel near to vertical ...
Montes Vides Luis Alfredo, Bravo Niño Claudia Lily   +1 more
doaj  

Método de Levantamento Topo-Batimétrico do Perfil do Sistema Praia-Antepraia

Revista Brasileira de Geomorfologia, 2004
É apresentada uma metodologia de levantamento topo-batimétrico visando o acoplamento do perfil da praia ao perfil submarino da antepraia, a partir de um mesmo datum vertical de referência em terra, transposto por nivelamento para o ajuste do ecobatimetro,
Dieter Muehe
doaj   +1 more source

A Triassic chronostratigraphic and palaeogeographic framework for the Utsira High area, northern North Sea: Reconstructing a basin‐scale drainage divide

Sedimentology, EarlyView.
ABSTRACT The Triassic succession of the northern North Sea comprises a series of interbedded sandstones, mudstones and conglomerates deposited under a fluctuating arid to semi‐humid climate regime, which are often difficult to correlate regionally due to differing lithostratigraphic schemes and poor age control. Despite existing regional studies on the
Riccardo Sordi, Adrian Hartley, Shaan Heydenrych, Spyridon Saltapidas   +3 more
wiley   +1 more source

High-resolution regional gravity field modeling to connect the local vertical systems in South America to the IHRF

Earth, Planets and Space
Since 2015, the scientific community has been working on unifying the global vertical system, following the resolution for the definition and realization of an International Height Reference System.
Gabriel do Nascimento Guimarães, Ana Cristina Oliveira Cancoro de Matos, Denizar Blitzkow, Flavio Guilherme Vaz de Almeida   +3 more
doaj   +1 more source

On the geoid and orthometric height vs. quasigeoid and normal height

Journal of Geodetic Science, 2018
The geoid, but not the quasigeoid, is an equipotential surface in the Earth’s gravity field that can serve both as a geodetic datum and a reference surface in geophysics. It is also a natural zero-level surface, as it agrees with the undisturbed mean sea
Sjöberg Lars E.
doaj   +1 more source

A quality investigation of global vertical datum connection [PDF]

Geophysical Journal International, 1992
SUMMARY Vertical datum connection is investigated from the viewpoint of quality, i.e. accuracy and reliability, based on the method originally proposed by Rummel & Teunissen (1988). Three simulations are carried out. The levelling accuracy is assumed to be 1 mmkm-1 and the position accuracy of space stations 5 cm. The three error models of the geoid
openaire   +1 more source

Multi‐Hazard Shaking‐Tsunami Fatality Risk Estimation for Coastal Communities

Earthquake Engineering &Structural Dynamics, Volume 55, Issue 11, Page 2618-2633, September 2026.
ABSTRACT This study develops a multi‐hazard fatality risk model for a coastal community (Tofino) on Vancouver Island, Canada, subjected to earthquake‐tsunami threats from the Cascadia subduction megathrust events. The model incorporates variable population distributions and uncertain fatality rate models, in addition to other key model components, such
Katsuichiro Goda
wiley   +1 more source

Results of GPS reprocessing campaign (1996-2011) provided by Geodetic observatory Pecný

Geoinformatics FCE CTU, 2012
The paper presents the GOP first reprocessing results, which officially contributed to the EPN-repro1 project. It also describes the 15-year GOP cumulative solution providing station coordinates, velocities and their discontinuities over the period of ...
Jan Douša, Pavel Václavovic
doaj   +1 more source