Results 31 to 40 of about 1,421,677 (272)

Establishment of Chart Datum and Vertical Datum Transformation for Hydrography in the Chinese Great Wall Bay, Antarctic Peninsula

open access: yes, 2020
The Great Wall bay has become an important investigation area due to the establishment of the Chinese Antarctic Great Wall scientific research station.
Hao Ke   +5 more
semanticscholar   +1 more source

Formal deformation of curves with group scheme action [PDF]

open access: yes, 2004
We study equivariant deformations of singular curves with an action of a finite flat group scheme, using a simplified version of Illusie's equivariant cotangent complex.
Wewers, Stefan
core   +3 more sources

Uvajanje sodobnega višinskega sistema v Sloveniji : Towards a new height system in Slovenia [PDF]

open access: yesGeodetski Vestnik, 2007
The paper gives the outline of the modern physical height systems which are based on levelling and gravity surveys. Also, the Slovenian vertical networks are presented (vertical datum and height system) with all their drawbacks.
Božo Koler, Klemen Medved, Miran Kuhar
doaj  

Mean Sea Level and Tides Variations at Alexandria, Egypt over 1906-2020 [PDF]

open access: yesJES: Journal of Engineering Sciences, 2022
Sea Level Rise (SLR) is a vital outcome of the environmental global warming phenomenon. This paper aims to investigate the basic properties of tides in Alexandria, Egypt and to analyze Sea Level Rise (SLR) in Egypt over a long period in order to examine ...
Gomaa Dawod   +2 more
doaj   +1 more source

Deflection and frequency monitoring of the Forth Road Bridge, Scotland, by GPS [PDF]

open access: yes, 2012
Permission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees. Copyright © 2012 Thomas Telford Ltd.The use of carrier phase kinematic GPS (global positioning system) has evolved ...
Atkins, C   +5 more
core   +2 more sources

Empirical investigations towards establishing a geoid-based vertical datum over South Africa

open access: yesSouth African Journal of Geomatics
This study investigates prospects for establishing a geoid-based vertical datum in South Africa and aligning it with the International Height Reference System (IHRS) to modernise and unify vertical positioning.
Matthews Siphiwe Mphuthi, P. Odera
semanticscholar   +1 more source

Uplift and subsidence associated with the great Aceh-Andaman earthquake of 2004 [PDF]

open access: yes, 2006
Rupture of the Sunda megathrust on 26 December 2004 produced broad regions of uplift and subsidence. We define the pivot line separating these regions as a first step in defining the lateral extent and the downdip limit of rupture during that great M_w ≈
Abrams, Michael   +6 more
core   +1 more source

Development of Saudi continuous chart datum: Arabian Gulf case study

open access: yesGeomatics, Natural Hazards & Risk, 2019
Global navigation satellite systems (GNSS) is widely utilized in marine applications for high accuracy vertical positioning. The errors introduced to charts by the present use of traditional shore-based discrete point chart datum (CD) can become a ...
Mohammed El-Diasty   +2 more
doaj   +1 more source

On the Establishment Method of Marine Vertical Datum Seamless System

open access: yesIOP Conference Series: Earth and Environment, 2019
At present, all kinds of vertical datum can only suit partial sea so that it leads to severe questions in three fields: data conjoint, data switch and export, data application.
Yang Cui   +4 more
semanticscholar   +1 more source

Distribution of discontinuous mudstone beds within wave-dominated shallow-marine deposits : Star Point Sandstone and Blackhawk Formation, Eastern Utah [PDF]

open access: yes, 2014
Acknowledgements Funding for this study was provided from the Research Council of Norway through the Petromaks project 193059 and the FORCE Safari Project. The lidar data was collected by Julien Vallet and Samuel Pitiot of Helimap Systems SA.
Buckley, Simon   +2 more
core   +2 more sources

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