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On determining orthometric heights from a corrector surface model based on leveling observations, GNSS, and a geoid model / Su-Kyung Kim in Journal of applied geodesy, vol 12 n° 4 (October 2018)  

Public [article]  inJournal of applied geodesy > vol 12 n° 4 (October 2018) . - pp 323 - 333 Titre : On determining orthometric heights from a corrector surface model based on leveling observations, GNSS, and a geoid model Type de document : Article/Communication Auteurs : Su-Kyung Kim, Auteur ; Jihye Park, Auteur ; Daniel T. Gillins, Auteur ; Michael Dennis, Auteur Année de publication : 2018 Article en page(s) : pp 323 - 333 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] altitude orthométrique [Termes IGN] coefficient de corrélation [Termes IGN] compensation de coordonnées [Termes IGN] erreur en position [Termes IGN] géoïde gravimétrique [Termes IGN] hauteur ellipsoïdale [Termes IGN] North American Vertical Datum 1988 [Termes IGN] Oregon (Etats-Unis) [Termes IGN] système de référence altimétrique [Vedettes matières IGN] Altimétrie Résumé : (auteur) Leveling is a traditional geodetic surveying technique that has been used to realize a vertical datum. However, this technique is time consuming and prone to accumulate errors, where it relies on starting from one station with a known orthometric height. Establishing orthometric heights using Global Navigation Satellite Systems (GNSS) and a geoid model has been suggested [14], but this approach may involve less precisions than the direct measurements from leveling. In this study, an experimental study is presented to adjust the highly accurate leveling observations along with orthometric heights derived from GNSS observations and a geoid model. For the geoid model, the National Geodetic Survey’s gravimetric geoid model (TxGEOID16B) and hybrid geoid model (GEOID12B) were applied. Uncertainties in the leveled height differences, GNSS derived heights, and the geoid models were modeled, and a combined adjustment was implemented to construct the optimal combination of orthometric, ellipsoidal, and geoid height at each mark. As a result, the discrepancy from the published orthometric heights and the CSM (Corrector Surface Model) based adjusted orthometric heights with GEOID12B showed a mean and RMS of -8.5 mm and 16.6 mm, respectively, while TxGEOID16B had a mean and RMS of 28.9 mm and 34.6 mm, respectively. It should be emphasized that this approach was not influenced by the geodetic distribution of the stations where the correlation coefficients between the distance from the center of the surveying network and the discrepancy from the published heights using TxGEOID16B and GEOID12B are 0.03 and 0.36, respectively. Numéro de notice : A2018-672 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1515/jag-2018-0014 Date de publication en ligne : 29/08/2018 En ligne : https://doi.org/10.1515/jag-2018-0014 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91004 [article]

A spatial analysis of GEOID03 and GEOID09 in Connecticut / Kazi Arifuzzaman in Journal of applied geodesy, vol 10 n° 2 (June 2016)  

Public [article]  inJournal of applied geodesy > vol 10 n° 2 (June 2016) . - pp 95 - 102 Titre : A spatial analysis of GEOID03 and GEOID09 in Connecticut Type de document : Article/Communication Auteurs : Kazi Arifuzzaman, Auteur ; Raymond J. Hintz, Auteur Année de publication : 2016 Article en page(s) : pp 95 - 102 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique [Termes IGN] analyse spatiale [Termes IGN] Connecticut (Etats-Unis) [Termes IGN] krigeage [Termes IGN] North American Vertical Datum 1988 [Termes IGN] régression [Termes IGN] United States Gravimetric Geoid 2009 Résumé : (auteur) The National Geodetic Survey (NGS) recommends using a hybrid geoid model to derive orthometric heights from ellipsoid heights. The accuracy of GEOID03 and GEOID09 were assessed independently in Connecticut. The present research analyses the spatial behavior of residuals derived from the comparison of differential levelled NAVD 88 orthometric heights and GPS-derived orthometric heights (using GEOID03 & GEOID09) at 72 benchmarks in Connecticut. Both geometrical and geostatistical analyses were performed on the residuals. A planar regression model indicates a weak spatial relation for residuals derived from GEOID03. This weakness was not noted in the analysis of residuals derived from GEOID09. Results of a four-parameter regression model does not indicate any need for a correction surface. A kriging surface was created with a fitted spherical semivariogram model and suggests GEOID09 captures more spatial variability of geoid undulation than GEOID03 in Connecticut. Numéro de notice : A2016-557 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/jag-2015-0013 En ligne : http://dx.doi.org/10.1515/jag-2015-0013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81717 [article]

Retracing the past: recovering 19th century benchmarks to measure shoreline change along the outer shore of Cape Cod, Massachusetts / S. Mague in Cartography and Geographic Information Science, vol 39 n° 1 (January 2012)  

Public [article]  inCartography and Geographic Information Science > vol 39 n° 1 (January 2012) . - pp 30 - 47 Titre : Retracing the past: recovering 19th century benchmarks to measure shoreline change along the outer shore of Cape Cod, Massachusetts Type de document : Article/Communication Auteurs : S. Mague, Auteur Année de publication : 2012 Article en page(s) : pp 30 - 47 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse diachronique [Termes IGN] dix-neuvième siècle [Termes IGN] littoral [Termes IGN] Massachusetts (Etats-Unis) [Termes IGN] North American Datum 1983 [Termes IGN] North American Vertical Datum 1988 [Termes IGN] trait de côte Résumé : (Auteur) Between 1887 and 1888, Henry L. Marindin, Assistant Topographer of the U.S. Coast & Geodetic Survey, conducted a detailed survey of the outer shores of Cape Cod, Massachusetts, providing an important base line for future comparisons, "which will he of value to geologists and others who study the changes in the coast-line". In 2007, the Land-Sea Interaction Program of the Provincetown Center for Coastal Studies began a project to resurvey Marindin's profiles and cross-sections to quantify changes to landforms and the nearshore environment that have occurred over the past century for use in estimating future conditions in the context of climate change and sea level rise. In order to facilitate reliable, quantitative shoreline comparisons, the translation of historical spatial data to contemporary horizontal (e.g., NAD83) and vertical (e.g., NAVD88) reference systems is paramount. With historical transects translated to NAD83 using methods developed as part of a previous study, the goal of this work is to develop an accurate estimate of the relationship between Marindin's elevation data and NAVD88. Recognizing that the physical and social landscape had changed significantly over the past 120+ years, a historical base map was prepared to assist with the recovery of 19th century benchmarks. Using the base map, five Coast survey benchmarks were recovered and resurveyed. Based on the results of this work, the local mean sea level datum of Marindin's survey is estimated to be 1.13 feet (0.34 meters) below the NAVD88 plane of reference. Numéro de notice : A2012-295 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/1523040639130 En ligne : https://doi.org/10.1559/1523040639130 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31741 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2012011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Development of comprehensive geodetic vertical datums for the United States Pacific Territories of American Samoa, Guam, and the Northern Marianas / E. Carlson in SaLIS Surveying and land information science, vol 69 n° 1 (March 2009)

Public [article]  inSaLIS Surveying and land information science > vol 69 n° 1 (March 2009) . - pp 5 - 17 Titre : Development of comprehensive geodetic vertical datums for the United States Pacific Territories of American Samoa, Guam, and the Northern Marianas Type de document : Article/Communication Auteurs : E. Carlson, Auteur ; D. Doyle, Auteur ; D. Smith, Auteur Année de publication : 2009 Article en page(s) : pp 5 - 17 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] carte topographique [Termes IGN] Guam (Etats-Unis ; île) [Termes IGN] inondation [Termes IGN] littoral [Termes IGN] Mariannes du Nord, îles [Termes IGN] North American Vertical Datum 1988 [Termes IGN] Polynésie [Termes IGN] réseau géodésique local [Termes IGN] système de référence local Résumé : (Auteur) The importance of establishing accurate heights to support engineering, mapping, and scientific applications is very well recognized. A network of stable, easily accessible survey control points, referred to as bench marks (BMs), is crucial to a wide range of activities, including coastal zone management, floodplain mapping, stormwater and sewer utility management, large-scale engineering projects, hurricane evacuation and recovery planning, and topographic mapping. The official heights reported on a network of BMs are usually defined with respect to a regional, national, or international geodetic datum, such as the North American Vertical Datum of 1988 (NAVD 88). In the United States, the official vertical datums of each region are fundamental components of the National Spatial Reference System (NSRS), which is maintained by the National Geodetic Survey (NGS), an office of the National Ocean Service (NOS), National Oceanic and Atmospheric Administration (NOAA). Copyright SaLIS Numéro de notice : A2009-192 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83668 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
121-09011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

What does height really mean? Part 3 height systems / Thomas H. Meyer in Surveying and land information science, vol 66 n° 2 (01/09/2006)

Public [article]  inSurveying and land information science > vol 66 n° 2 (01/09/2006) . - pp 149 - 160 Titre : What does height really mean? Part 3 height systems Type de document : Article/Communication Auteurs : Thomas H. Meyer, Auteur ; D.R. Roman, Auteur ; David B. Zilkoski, Auteur Année de publication : 2006 Article en page(s) : pp 149 - 160 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie [Termes IGN] altitude dynamique [Termes IGN] altitude normale [Termes IGN] altitude orthométrique [Termes IGN] cote géopotentielle [Termes IGN] géoïde [Termes IGN] hauteur ellipsoïdale [Termes IGN] North American Vertical Datum 1988 Résumé : (Auteur) This is the third paper in a four-part series considering the fundamental question, “what does the word “height” really mean?” The first paper reviewed reference ellipsoids and mean sea level datums. The second paper reviewed the physics of heights culminating in a simple development of the geoid and explained why mean sea level stations are not all at the same orthometric height. This third paper develops the principle notions of height, namely measured, differentially deduced changes in elevation, orthometric heights, Helmert orthometric heights, normal orthometric heights, dynamic heights, and geopotential numbers. We conclude with a more in-depth discussion of current thoughts regarding the geoid. Copyright SaLIS Numéro de notice : A2006-471 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28195 [article]

Voir aussi

• What does height really mean? Part 2: physics and gravity / Thomas H. Meyer in Surveying and land information science, vol 65 n° 1 (01/03/2005)
• What does height really mean? Part 4 GPS heighting / Thomas H. Meyer in Surveying and land information science, vol 66 n° 3 (01/09/2006)

A gravimetric geoid model as a vertical datum in Canada / Marc Véronneau in Geomatica, vol 60 n° 2 (June 2006)  

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Integrating LIDAR elevation data, multi-spectral imagery and neural network modelling for marsh characterization / J.T. Morris in International Journal of Remote Sensing IJRS, vol 26 n° 23 (December 2005)  

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The North American Vertical Datum of 1988 (NAVD'88) : internal status report prepared for CISM'88 Winnipeg, Manitoba, may 24-27, 1988 / F.W. Young in CISM Journal, vol 43 n° 4 (December 1989)

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Status of NAVD 88 datum definition / David B. Zilkoski (29/03/1987)

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Proceedings, Third international symposium on the North American Vertical Datum, NAVD symposium '85, Rockville, Maryland, April 21-26, 1985 / David B. Zilkoski (1985)  

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Deuxième symposium international sur les problèmes reliés à la définition des réseaux géodésiques verticaux nord-américains / Association canadienne des sciences géodésiques et cartographiques (1980)

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