Results 21 to 30 of about 20,151 (197)

ADAPTATION OF THE GLOBAL GEOID MODEL EGM2008 ON CAMPANIA REGION (ITALY) BASED ON GEODETIC NETWORK POINTS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021
The knowledge of the geoid undulation, the height of the geoid relative to a given ellipsoid of reference, is fundamental to transform the ellipsoidal heights into orthometric heights.
G. Ferrara, C. Parente
doaj   +1 more source

Accuracy assessment and comparison of interpolation methods on geoid models [PDF]

Geodetski Vestnik, 2018
In this paper the accuracy of 6 spatial interpolation methods on geoid grid models are tested and compared: Inverse Distance Weighting, Kriging, Minimum Curvature, Natural Neighbour, Radial Basis Function and Moving Average.
Marko Radanović, Tomislav Bašić
doaj   +1 more source

GRAVIMETRIC GEOID MODELLING OVER PENINSULAR MALAYSIA USING TWO DIFFERENT GRIDDING APPROACHES FOR COMBINING FREE AIR ANOMALY [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
We investigate the use of the KTH Method to compute gravimetric geoid models of Malaysian Peninsular and the effect of two differing strategies to combine and interpolate terrestrial, marine DTU17 free air gravity anomaly data at regular grid nodes ...
M. F. Pa’suya, M. F. Pa’suya, A. H. M. Din, A. H. M. Din, J. C. McCubbine, A. H. Omar, Z. M. Amin, N. A. Z. Yahaya   +7 more
doaj   +1 more source

A Comparison of Gravimetric, Isostatic, and Spectral Decomposition Methods for a Possible Enhancement of the Mantle Signature in the Long-Wavelength Geoidal Geometry

Remote Sensing, 2023
A long-wavelength geoidal geometry characterizes the most pronounced features of the Indian Ocean geoid low and the West Pacific and North Atlantic geoid highs.
Robert Tenzer, Wenjin Chen
doaj   +1 more source

Analysis of high-resolution global gravity field models for the estimation of International Height Reference System (IHRS) coordinates in Argentina

Journal of Geodetic Science, 2022
Following the definition and realization of the International Height Reference System (IHRS), the vertical coordinate of a given point at the Earth’s surface can be obtained from the computation of the geopotential value from a harmonic expansion of a ...
Tocho Claudia N., Antokoletz Ezequiel D., Gómez Agustín R., Guagni Hernán, Piñon Diego A.   +4 more
doaj   +1 more source

Combining Global Geopotential Models, Digital Elevation Models, and GNSS/Leveling for Precise Local Geoid Determination in Some Mexico Urban Areas: Case Study

ISPRS International Journal of Geo-Information, 2021
This work shows improvements of geoid undulation values obtained from a high-resolution Global Geopotential Model (GGM), applied to local urban areas.
Norberto Alcantar-Elizondo, Ramon Victorino Garcia-Lopez, Xochitl Guadalupe Torres-Carillo, Guadalupe Esteban Vazquez-Becerra   +3 more
doaj   +1 more source

TanDEM-X PolarDEM 90 m of Antarctica: generation and error characterization [PDF]

The Cryosphere, 2021
We present the generation and validation of an updated version of the TanDEM-X digital elevation model (DEM) of Antarctica: the TanDEM-X PolarDEM 90 m of Antarctica.
B. Wessel, M. Huber, C. Wohlfart, C. Wohlfart, A. Bertram, N. Osterkamp, U. Marschalk, A. Gruber, A. Gruber, F. Reuß, F. Reuß, S. Abdullahi, I. Georg, A. Roth   +13 more
doaj   +1 more source

Evaluation of the recent high-degree combined global gravity-field models for geoid modelling over Kenya

Geodesy and Cartography, 2020
This study carries out an evaluation of the recent high-degree combined global gravity-field models (EGM2008, EIGEN-6C4, GECO and SGG-UGM-1) over Kenya. The evaluation is conducted using observed geoid undulations (18 data points, mainly in Nairobi area)
Patroba Achola Odera
doaj   +1 more source

The Upper Mantle Geoid for Lithospheric Structure and Dynamics

Journal of Geophysical Research: Solid Earth, 2023
Geoid anomalies offer crucial information on the internal density structure of the Earth, and thus, on its constitution and dynamic state. In order to interpret geoid undulations in terms of depth, magnitude and lateral extension of density anomalies in ...
F. Salajegheh, J. C. Afonso
semanticscholar   +1 more source

Evaluation of the geopotential value W0LVD of China

Geodesy and Geodynamics, 2017
Estimation of the zero-height geopotential value W0LVD for the CVD (China Vertical Datum) plays a fundamental role in the connection of traditional height reference systems into a global height system.
Lin He, Yonghai Chu, Nan Yu
doaj   +1 more source