Results 31 to 40 of about 117,029 (163)

Definition and Realization of a Global Vertical Datum [PDF]

, 1994
The requirements for defining and realizing a global vertical datum (GVD) with a precision on the dm - or even cm - level has become essential now, due to the improved measurement accuracy provided by the space geodetic techniques.
Balasubramania, Nagarajan
core   +1 more source

From static to dynamic datums: 150 years of geodetic datums in New Zealand [PDF]

New Zealand Journal of Geology and Geophysics, 2016
ABSTRACT The geodetic system in New Zealand plays an important role in the development of our country. It comprises intellectual, physical and data components which provide authoritative coordinate systems for New Zealand's areas of territorial and administrative responsibility.
G Blick, N Donnelly
openaire   +1 more source

Automating Archaeological Discovery: Assessing Geospatial Artificial Intelligence (GeoAI) Tools for Stone Wall Identification in Kweneng, South Africa

Archaeometry, Volume 68, Issue 5, Page 1152-1164, October 2026.
ABSTRACT The discovery of archaeological sites traditionally entails the utilisation of physically demanding exploration methodologies, including terrain surveying and the analysis of historical records. Recent technological developments have led to an increased use of non‐invasive remote sensing techniques, including Google Earth, LiDAR and aerial ...
Mncedisi J. Siteleki
wiley   +1 more source

Implementation of CORS GNSS and local geoid for precise orthometric height determination in land subsidence region (a case study in Semarang City)

Journal of Geospatial Information Science and Engineering, 2019
Geoid has an important role in converting geodetic heights to physical heights, both in orthometric height system and normal height systems. At present, Semarang City already has gravimetric geoid with centimeter-level precision.
Laode M Sabri
doaj   +1 more source

A detailed quasigeoid model of the Hong Kong territories computed by applying a finite-element method of solving the oblique derivative boundary-value problem

Journal of Geodetic Science, 2023
New gravity and precise levelling measurements have been performed throughout the Hong Kong territories to modernize a vertical geodetic datum that is currently realized by heights of levelling benchmarks defined in the Hong Kong Principal Datum (HKPD ...
Čunderlík Robert, Tenzer Robert, Macák Marek, Zahorec Pavol, Papčo Juraj, Nsiah Ababio Albertini   +5 more
doaj   +1 more source

The implementation and advancement of a regional geodetic vertical datum

IOP Conference Series: Earth and Environmental Science, 2021
Abstract The essential parameter in computing three-dimensional coordinate system is the height or depth of the Earth’s surface. It represents a particular reference surface that recognised as a vertical datum. The vertical datum is alienated into two foremost categories recognised as Mean Sea Level and Lowest Astronomical Tide ...
N M Yazid, A H M Din, A H Omar, M F Pa’suya, N M Abdullah   +4 more
openaire   +1 more source

Generation and Preservation of Submarine Terraces: Insights From Records Imprinted on the Topography of Dokdo Volcano

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Marine terraces archive sea‐level and tectonic history, yet their relationship to individual highstands remains contentious. While most studies focus on subaerial terraces in uplifting settings, submerged terraces in subsiding settings are less explored. We develop a 1‐D wave‐erosion model and apply it to Dokdo — a subsiding volcanic island in
Duhwan Keum, Chang Hwan Kim, Luca C. Malatesta, Wonsuck Kim   +3 more
wiley   +1 more source

Transformacija koordinata između Gaus-Krigerove i Svetske poprečne Merkatorove projekcije za teritoriju Srbije / Procedure and formulas for coordinate transformations between the Gauss-Krüger projections and the Universal Transverse Mercator projections for Serbia

Vojnotehnički Glasnik, 2008
U radu je prikazan postupak i predložene su formule za transformacije iz Gaus-Krigerove projekcije, koja se koristi u Srbiji, u Svetsku poprečnu Merkatorovu projekciju i obratno.
Stevan Radojčić
doaj   +1 more source

The Role of Tectonic Inheritance in Active Rift Seismicity and Magmatism: Constraints From 3‐D Gravity Inversion and D‐InSAR Modeling of the 2025 Fentale Swarm, Ethiopia

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract The role of inherited lithospheric structures in active rift seismicity and magma intrusion remains a key uncertainty in continental breakup dynamics. We investigate the January 2025 Northern Main Ethiopian Rift swarm using constrained 3‐D gravity inversion and D‐InSAR observations to characterize crustal architecture, seismicity, and active ...
Denberu Besfat, Tilahun Mammo
wiley   +1 more source

Fault‐Controlled Plumbing System Beneath Lipari Volcanic Island Revealed by Seismic Matrix Imaging

Geophysical Research Letters, Volume 53, Issue 17, 16 September 2026.
Abstract Lipari Island hosts an active magmatic–hydrothermal system, but its deep plumbing architecture remains poorly resolved due to strong seismic scattering. We apply passive seismic matrix imaging to public vertical‐component cross‐correlation functions from the dense 2018 Lipari nodal array, recovering relative‐reflectivity structures to ∼10 km ...
Jia Wei, Qiancheng Liu, Ling Chen
wiley   +1 more source