Relevant bibliographies by topics / Geoidal maps

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  2. Dissertations / Theses
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  4. Book chapters
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Academic literature on the topic 'Geoidal maps'

Author: Grafiati
Published: 5 June 2025
Last updated: 2 August 2025

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Journal articles on the topic "Geoidal maps"

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Tukka, A. A., H. Tata, and O. T. Idowu. "A Computational Tool for Local Gravimetric Geoid Determination Using Least Squares Collocation." Journal of Spatial Information Sciences 2, no. 1 (2025): 251–74. https://doi.org/10.5281/zenodo.14961951.

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<em>This study presents a computational tool (TUIDOTA), for determining local gravimetric geoids using Least Squares Collocation (LSC) techniques, essential for geodetic applications. The geoid provides a reference surface for determining the height of the earth's surface. The study focuses on evaluating the potential of the tool within Akure South Local Government Area in Ondo State of Nigeria, representing mountainous terrains. High-quality terrestrial gravity data, geopotential, and digital elevation models were used. The developed tool facilitates the selection between SLSC and NSLSC, maki
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Tenzer, Robert, and Peter Vajda. "Global maps of the step-wise topography corrected and crustal components stripped geoids using the CRUST 2.0 model." Contributions to Geophysics and Geodesy 39, no. 1 (2009): 1–17. http://dx.doi.org/10.2478/v10126-009-0001-9.

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Global maps of the step-wise topography corrected and crustal components stripped geoids using the CRUST 2.0 modelWe compile global maps of the step-wise topography corrected and crustal components stripped geoids based on the geopotential model EGM'08 complete to spherical harmonic degree 180 and the CRUST 2.0 global crustal model. The spectral resolution complete to degree 180 is used to compute the primary indirect bathymetric stripping and topographic effects on the geoid, while degree 90 for the primary indirect ice stripping effect. The primary indirect stripping effects of the soft and
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Madufor, M.O., M.N. Ono, A.O. Oliya, and W. A. Ojanikele. "Modeling of Orthometric Heights from Multi-Networks of GNSS/Precise Levelling in Owerri and Environs, Imo State, Nigeria." Journal of Scientific and Engineering Research 10, no. 11 (2023): 35–40. https://doi.org/10.5281/zenodo.10465693.

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<strong>Abstract </strong>Orthometric heights based on GNSS require a geoid model to convert highly accurate ellipsoidal height (h) to the much-desired orthometric height (H) critical to many cadastral, surveying, mapping, engineering and environmental applications. The GNSS uses the default integrated global geoid models (EGM96/EGM2008) for ellipsoidal height conversion to orthometric but for local applications, global model is inadequate and hence development of local geoid models in the absence of a national geoid becomes very critical. The aim of this research is to model orthometric heigh
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Guimarães, Gabriel Do Nascimento, Ana Cristina Oliveira Cancoro De Matos, and Denizar Blitzkow. "GRAVIMETRIC DENSIFICATION IN THE STATE OF SÃO PAULO AIMING A GEOID MODEL." Revista Brasileira de Geofísica 31, no. 4 (2013): 631. http://dx.doi.org/10.22564/rbgf.v31i4.343.

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ABSTRACT. Gravitydata coverage is quite complete in São Paulo state for a 5’ resolution. In addition, field works have been conducted to fill in gaps around the state. These efforts are the results of the Fundac¸˜ao de Amparo `a Pesquisa do Estado de S˜ao Paulo (FAPESP) Thematic Project that seeks to achieve the establishment of a geoid model, a height system, and the study of mean sea level. This paper presents a comparison between two geoidal height models; the first with information available up to 2008 (beginning of the project) and the second including all data collected. Both models have
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Sievers, J., C. S. M. Doake, J. Ihde, et al. "Validating and improving elevation data of a satellite-image map of Filchner,Ronne Ice Shelf, Antarctica, with Results from ERS-1." Annals of Glaciology 20 (1994): 347–52. http://dx.doi.org/10.3189/1994aog20-1-347-352.

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A satellite-image map with surface-elevation contours of Filchner Ronne Ice Shelf has been published previously as a topographic map. The image map was constructed from a mosaic of 69 Landsat Multispectral Scanner (MSS) images and NOAA AVHRR data. The standard deviation in position in the central part of the mosaic is ±125m. Topographic-glaciologic features were taken from Landsat scenes and represent the best coastline of this region. Surface elevations have been calculated from airborne and ground measurements of either ice thickness (by assuming hydrostatic equilibrium) or barometric pressu
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Sievers, J., C. S. M. Doake, J. Ihde, et al. "Validating and improving elevation data of a satellite-image map of Filchner,Ronne Ice Shelf, Antarctica, with Results from ERS-1." Annals of Glaciology 20 (1994): 347–52. http://dx.doi.org/10.1017/s0260305500016670.

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A satellite-image map with surface-elevation contours of Filchner Ronne Ice Shelf has been published previously as a topographic map. The image map was constructed from a mosaic of 69 Landsat Multispectral Scanner (MSS) images and NOAA AVHRR data. The standard deviation in position in the central part of the mosaic is ±125m. Topographic-glaciologic features were taken from Landsat scenes and represent the best coastline of this region. Surface elevations have been calculated from airborne and ground measurements of either ice thickness (by assuming hydrostatic equilibrium) or barometric pressu
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Marotta, Giuliano, Yellinson Almeida, and Maria Lígia Chuerubim. "Análise da Influência do Valor de Densidade na Estimativa do Modelo Geoidal Local para o Distrito Federal, Brasil." Revista Brasileira de Cartografia 71, no. 4 (2019): 1089–113. http://dx.doi.org/10.14393/rbcv71n4-49274.

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O modelo geoidal é parte fundamental na transformação entre as altitudes geométricas e ortométricas, e ganhou mais importância com a popularização de técnicas de posicionamento por GNSS. No entanto, para simplificar, verifica-se que um valor de densidade médio da crosta ainda vem sendo aplicado nos procedimentos de cálculo. Por este motivo, este trabalho buscou analisar a influência do valor de densidade adotado na estimativa de um modelo geoidal. Para isto foram estimados valores fixo e variáveis de densidade para a área de estudos, por meio de dados gravimétricos e de litologia. Estes valore
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Marques, Éder Teixeira, William Rodrigo Dal Poz, and Gabriel Do Nascimento Guimarães. "GEOID MODELLING USING INTEGRATION AND FFT ASSOCIATED WITH DIFFERENT GRAVIMETRIC REDUCTION METHODS." Revista Brasileira de Geofísica 36, no. 1 (2018): 81. http://dx.doi.org/10.22564/rbgf.v36i1.909.

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ABSTRACT. A vertical reference system is characterized by a vertical datum and a set of scientific altitudes. In the case of orthometric altitudes, the geoid is used as a reference surface, equipotential surface of the gravity field of the Earth that better fits, in the sense of the Least Square Method, to the mean sea level. This study aimed to determine the geoid by applying two processes for calculation of residual ondulation, the integration and the Fast Fourier Transform. These techniques were applied to the values of the residual anomalies obtained from different methods of gravimetric r
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Matos, Ana Cristina Oliveira Cancoro de, Denizar Blitzkow, Gabriel do Nascimento Guimarães, Maria Cristina Barbosa Lobianco, and Sônia Maria Alves Costa. "Validação do MAPGEO2010 e comparação com modelos do geopotencial recentes." Boletim de Ciências Geodésicas 18, no. 1 (2012): 101–22. http://dx.doi.org/10.1590/s1982-21702012000100006.

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Este trabalho visa apresentar a metodologia de cálculo e analisar o resultado do modelo de alturas geoidais para o Brasil. O mesmo abrange a área compreendida pelas latitudes de 6ºN e 35ºS e pelas longitudes de 75ºW e 30ºW. Os dados gravimétricos terrestres foram atualizados com as mais recentes medições no Brasil e seus países vizinhos. As anomalias completas de Bouguer e de Helmert sobre a superfície terrestre foram calculadas através do pacote canadense SHGEO. A componente de curto comprimento de onda foi estimada através da integral modificada de Stokes utilizando a técnica FFT. O modelo d
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Ashkenazi, V. "Coordinate Systems: How to Get Your Position Very Precise and Completely Wrong." Journal of Navigation 39, no. 2 (1986): 269–78. http://dx.doi.org/10.1017/s0373463300000126.

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Positioning by navigation satellites is carried out in three-dimensional geocentric cartesian coordinates, X, Y, Z. This applies to both the Transit System, which has now been in operation for over 20 years, and the Global Positioning System which is being tested and is due to become operational in 1988. Traditionally, the cartographer, the seafaring navigator and the geodetic surveyor have always expressed their coordinates in geographical terms, i.e. latitude and longtitude, whereas the land-based civil engineer, surveyor and the foot (or mechanized) soldier preferred theirs in terms of proj
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Dissertations / Theses on the topic "Geoidal maps"

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Sekhar, Pavithra. "Three-Dimensional Spherical Modeling of the Mantles of Mars and Ceres: Inference from Geoid, Topography and Melt History." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/46873.

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Mars is one of the most intriguing planets in the solar system. It is the fourth terrestrial planet and is differentiated into a core, mantle and crust. The crust of Mars is divided into the Southern highlands and the Northern lowlands. The largest volcano in the solar system, Olympus Mons is found on the crustal dichotomy boundary. The presence of isolated volcanism on the surface suggests the importance of internal activity on the planet. In addition to volcanism in the past, there has been evidence of present day volcanic activity. Convective upwelling, including decompression melting, has
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Abdelmoula, Amine. "Résolution de problèmes inverses en géodésie physique." Phd thesis, Université Rennes 1, 2013. http://tel.archives-ouvertes.fr/tel-00990849.

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Ce travail traite de deux problèmes de grande importances en géodésie physique. Le premier porte sur la détermination du géoïde sur une zone terrestre donnée. Si la terre était une sphère homogène, la gravitation en un point, serait entièrement déterminée à partir de sa distance au centre de la terre, ou de manière équivalente, en fonction de son altitude. Comme la terre n'est ni sphérique ni homogène, il faut calculer en tout point la gravitation. A partir d'un ellipsoïde de référence, on cherche la correction à apporter à une première approximation du champ de gravitation afin d'obtenir un g
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Petrová, Kateřina. "Určování astronomických tížnicových odchylek přímým měřením." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-390220.

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This thesis deals with use of the measuring system MAAS-1 for direct determination of vertical deviations at the points specified field. The main input data are geographical and astronomical coordinates of points. The aim of this thesis is to complete the processing of data measured in the locality.
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Books on the topic "Geoidal maps"

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United States. National Aeronautics and Space Administration., ed. The delineation and interpretation of the earth's gravity field. National Aeronautics and Space Administration, 1987.

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United States. National Aeronautics and Space Administration., ed. Development of high accuracy and resolution geoid and gravity maps: Final technical report for the period 1 August 1983 - 31 March 1985. National Aeronautics and Space Administration, 1986.

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Book chapters on the topic "Geoidal maps"

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Noréus, Jonas P. "Effect of Water Vapour Corrections for Satellite Altimeter Measurements of the Geoid." In From Mars to Greenland: Charting Gravity With Space and Airborne Instruments. Springer New York, 1992. http://dx.doi.org/10.1007/978-1-4613-9255-2_13.

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Foroughi, Ismael, Mehdi Goli, Spiros Pagiatakis, et al. "The Uncertainties of the Topographical Density Variations in View of a Sub-Centimetre Geoid." In International Association of Geodesy Symposia. Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/1345_2023_189.

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AbstractWe estimate the uncertainty of the modelled geoid heights based on the standard deviations of the topographic mass density variation. We model the geoid using the one-step integration method considering mass density variations along with their associated error estimates to calculate the direct and indirect topographic density effects on the geoid heights in the Helmert space. We employ the UNB_TopoDensT_2v01 global lateral density model and its standard deviations and test our algorithms in the Auvergne test area, in central France. Our results show that the topographic mass density va
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Grgić, Marijan, and Tomislav Bašić. "Radar Satellite Altimetry in Geodesy - Theory, Applications and Recent Developments." In Geodetic Sciences - Theory, Applications and Recent Developments [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97349.

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Radar satellite altimetry has revolutionized our understanding of the Earth’s sea-level shape and its change over time, monitoring of the natural and human-induced water cycle, marine gravity computations, seafloor relief (bathymetry) reconstruction, tectonics, water mass balance change monitoring, etc., thus providing significant impact in geodesy. Today satellite radar altimetry is critical for unifying the vertical height systems, regional and global geoid modeling, monitoring of the sea level rise impact, monitoring of the ice sheet melting, and others. This chapter gives an overview of th
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Eshagh, Mehdi. "The Earth’s Gravity Field Role in Geodesy and Large-Scale Geophysics." In Geodetic Sciences - Theory, Applications and Recent Developments. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97459.

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The Earth gravity field is a signature of the Earth’s mass heterogeneities and structures and applied in Geodesy and Geophysics for different purposes. One of the main goals of Geodesy is to determine the physical shape of the Earth, geoid, as a reference for heights, but Geophysics aims to understand the Earth’s interior. In this chapter, the general principles of geoid determination using the well-known methods of Remove-Compute-Restore, Stokes-Helmert and least-squares modification of Stokes’ formula with additive corrections are shortly discussed. Later, some Geophysical applications like
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Sohor, Andrii. "A PRIORI RESEARCH RELATED TO THE CALCULATION OF THE REGIONAL ELLIPSOID FOR UKRAINE AND ITS EFFECTIVENESS." In Theoretical and practical aspects of the development of modern scientific research. Publishing House “Baltija Publishing”, 2022. http://dx.doi.org/10.30525/978-9934-26-195-4-13.

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Despite the high accuracy of global geodetic reference systems and their widespread use in GPS measurements, regional (local) geodetic systems are becoming more widely used. For example, the World Geodetic System 1984 (WGS84) has 83 such local systems. The emergence of the latter is caused by the emergence of new problems of physical geodesy. These are the so-called regional problems, which make it possible to study in more detail both the geometric and gravimetric (physical) properties of the studied region (territory). For example, the tasks of constructing a high-precision regional geoid (q
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Ramillien, Guillaume, and Lucía Seoane. "Continental Water Storage Changes Sensed by GRACE Satellite Gravimetry." In Geodetic Sciences - Theory, Applications and Recent Developments [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96109.

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Since its launch in March 2002, the Gravity Recovery And Climate Experiment (GRACE) mission has been mapping the time variations of the Earth’s gravity field with a precision of 2–3 cm in terms of geoid height at the surface resolution of 300–400 km. The unprecedented precision of this twin satellite system enables to detect tiny changes of gravity that are due to the water mass variations inside the fluid envelops of our planet. Once they are corrected from known gravitational contributions of the atmosphere and the oceans, the monthly and (bi)weekly GRACE solutions reveal the continental wat
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DAMASCENO, MATHEUS LAU, CAROLINE BATISTA SILVA DE SOUZA, and LUCIANA SEDANO DE SOUZA. "O NEGACIONISMO CIENTÍFICO ENTRE OS GRADUANDOS EM CIÊNCIAS BIOLÓGICAS: A PERCEPÇÃO SOBRE DISCURSOS NEGACIONISTAS FUNDAMENTADOS EM PSEUDOCIÊNCIA." In Ensino de Ciências. Editora Realize, 2023. http://dx.doi.org/10.46943/viii.conedu.2022.gt16.007.

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O negacionismo científico está diretamente relacionado a negar fatos e evidências já estudados e comprovados cientificamente. Existem grupos que negam os problemas ambientais, a eficácia das vacinas, o formato geoide da Terra e até mesmo a Teoria da Evolução proposta por Darwin. Sumariamente, esses grupos propagam seus discursos na tentativa de disseminar ideias infundadas, de forma veementes ou por frases mais articuladas simulando uma fundamentação. Entendendo que o negacionismo científico pode afetar negativamente a credibilidade da Ciência e compreendendo que os cursos de Ciências Biológic
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Sansó, Fernando, Riccardo Barzaghi, and Mirko Reguzzoni. "Molodensky’s and Helmert’s Theories: Two Equivalent Geodetic Approaches to the Determination of the Gravity Potential and the Earth Surface." In International Association of Geodesy Symposia. Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/1345_2023_212.

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AbstractA fundamental problem of physical geodesy is the determination of the “Surface of the Earth” and its gravitational potential from various types of observations performed on the Earth surface S itself or in the outer space. When data are derived from gravimetry on S we speak of Molodensky’s problem. Since the gravity field depends linearly on its source, i.e. the mass distribution, it follows that we can manipulate the (unknown) internal density in a known way and still return to the same external solution once the effects of the manipulation have been eliminated (restored). This is use
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Conference papers on the topic "Geoidal maps"

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Asimopolos, Natalia-Silvia, Laurentiu Asimopolos, and Adrian-Aristide Asimopoos. "ASSESSMENT OF GEOPHYSICAL DATASET IN THE CENTRAL SEGMENT OF THE SOUTHERN CARPATHIANS ROMANIA." In 24th SGEM International Multidisciplinary Scientific GeoConference 24. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/1.1/s05.591.

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In this work, I used the data from the geophysics portal of the Geological Institute of Romania (maps, sections), field measurements as well as the WGM 2012 model from the International Gravimetric Bureau. The measurements carried out in the south of the Southern Carpathians were represented by magnetometric measurements. Corroboration of geophysical information with geological and tectonic ones led to the confirmation of deep structures. The geological sources, which give geophysical samples specific to each geophysical method, are characterized differently depending on their size, depth, den
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Balaram, J. "Sherpa Moving Mass Entry Descent Landing System." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85283.

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We describe Sherpa — a Strap-on High-altitude Entry Reconnaissance &amp; Precision Aeromaneuver system that utilizes a moving mass system within an entry capsule to land a spacecraft precisely onto the surface of Mars. Sherpa uses two sets of “strap-on” assemblies, one for high-altitude sensing using a terrain imager, and another for agile hypersonic flight using a moving-mass steering device. In this paper we focus on the moving mass system — a steering device that provides an agile trajectory control capability that is mechanically simple, completely internal to the vehicle, has high control
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Reports on the topic "Geoidal maps"

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Nagy, D. Gravimetric geoid map of Canada. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1989. http://dx.doi.org/10.4095/127248.

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