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Optimal lowest astronomical tide estimation using maximum likelihood estimator with multiple ocean models hybridization / Mohammed El-Diasty in ISPRS International journal of geo-information, vol 9 n° 5 (May 2020)  

Public [article]  inISPRS International journal of geo-information > vol 9 n° 5 (May 2020) . - 11 p. Titre : Optimal lowest astronomical tide estimation using maximum likelihood estimator with multiple ocean models hybridization Type de document : Article/Communication Auteurs : Mohammed El-Diasty, Auteur Année de publication : 2020 Article en page(s) : 11 p. Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Océanographie [Termes descripteurs IGN] carte marine [Termes descripteurs IGN] données hydrographiques [Termes descripteurs IGN] incertitude des données [Termes descripteurs IGN] levé hydrographique [Termes descripteurs IGN] marée océanique [Termes descripteurs IGN] marégraphe [Termes descripteurs IGN] méthode du maximum de vraisemblance (estimation) [Termes descripteurs IGN] modèle océanographique [Termes descripteurs IGN] navigation maritime [Termes descripteurs IGN] niveau de la mer [Termes descripteurs IGN] océanographie dynamique [Termes descripteurs IGN] Rouge, mer Résumé : (auteur) Developing an accurate Lowest Astronomical Tide (LAT) in a continuous form is essential for many maritime applications as it can be employed to develop an accurate continuous vertical control datum for hydrographic surveys applications and to produce accurate dynamic electronic navigation charts for safe maritime navigation by mariners. The LAT can be developed in a continuous (surface) using an estimated LAT surface model from the hydrodynamic ocean model along with coastal discrete LAT point values derived from tide gauges data sets to provide the corrected LAT surface model. In this paper, an accurate LAT surface model was developed for the Red Sea case study using a Maximum Likelihood Estimator (MLE) with multiple hydrodynamic ocean models hybridization, namely, WebTide, FES2014, DTU10, and EOT11a models. It was found that the developed optimal hybrid LAT model using MLE with multiple hydrodynamic ocean models hybridization ranges from 0.1 m to 1.63 m, associated with about 2.4 cm of uncertainty at a 95% confidence level in the Red Sea case study area. To validate the accuracy of the developed model, the comparison was made between the optimal hybrid LAT model developed from multiple hydrodynamic ocean models hybridization using the MLE method with the individual LAT models estimated from individual WebTide, FES2014, DTU10, or EOT11a ocean models based on the associated uncertainties estimated at a 95% confidence level. It was found that the optimal hybrid LAT model accuracy is superior to the individual LAT models estimated from individual ocean models with an improvement of about 50% in average, based on the estimated uncertainties. The importance of developing optimal LAT surface model using the MLE method with multiple hydrodynamic ocean models hybridization in this paper with few centimeters level of uncertainty can lead to accurate continuous vertical datum estimation that is essential for many maritime applications. Numéro de notice : A2020-301 Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.3390/ijgi9050327 date de publication en ligne : 17/05/2020 En ligne : https://doi.org/10.3390/ijgi9050327 Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95141 [article]

Photogrammetric Bathymetry for the Canadian Arctic / Matus Hodul in Marine geodesy, Vol 43 n° 1 (janvier 2020)  

Public [article]  inMarine geodesy > Vol 43 n° 1 (janvier 2020) . - pp 23 - 43 Titre : Photogrammetric Bathymetry for the Canadian Arctic Type de document : Article/Communication Auteurs : Matus Hodul, Auteur ; René Chénier, Auteur ; Marc-André Faucher, Auteur ; et al., Auteur Année de publication : 2020 Article en page(s) : pp 23 - 43 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bathymétrie [Termes descripteurs IGN] Arctique, océan [Termes descripteurs IGN] Canada [Termes descripteurs IGN] carte marine [Termes descripteurs IGN] données hydrographiques [Termes descripteurs IGN] fond marin [Termes descripteurs IGN] image Worldview [Termes descripteurs IGN] télédétection spatiale Résumé : (auteur) Remote sensing is becoming common in the estimation of bathymetry for navigational charting through a process known as Satellite Derived Bathymetry (SDB). Most SDB techniques currently used by hydrographic offices employ an empirical approach, requiring the use of in-situ data to calibrate a relationship between spectral information and coincident depths. This article reports on a multi-site test of an alternative SDB method which uses photogrammetry to extract depths from stereo WorldView-2 imagery. In areas with heterogeneous seafloors, the empirical approach faces difficulties in establishing the relationship between colour and depth, while the photogrammetric approach uses the contrasting seafloor features for triangulation. Additionally, the photogrammetric method may be applied in areas lacking previous survey data. Five study areas in Nunavut, Canada were selected to test the robustness of the method in different environments and under different imaging conditions. Study areas were (with resulting RMSE/Bias given in metres) Coral Harbour (0.84/−0.47), Cambridge Bay (1.16/−0.15), Queen Maud Gulf (0.97/0.06), Arviat (0.99/−0.009), and Frobisher Bay, where extraction largely failed due to environmental conditions. Accuracies demonstrated here are similar to those seen using the empirical approach, suggesting that these two methods may be used in conjunction, each applied to regions where they are better suited. Numéro de notice : A2020-052 Thématique : IMAGERIE Nature : Article DOI : 10.1080/01490419.2019.1685030 date de publication en ligne : 22/11/2019 En ligne : https://doi.org/10.1080/01490419.2019.1685030 Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94920 [article]

Visual analysis of inconsistencies in hydraulic simulation data / Octave Perrin (2020)  

Public Titre : Visual analysis of inconsistencies in hydraulic simulation data Type de document : Article/Communication Auteurs : Octave Perrin, Auteur ; Sidonie Christophe , Auteur ; Florence Jacquinod, Auteur ; Olivier Payrastre, Auteur Congrès : Congrès: ISPRS 2020, virtual Congress Imaging today foreseeing tomorrow (31 aout - 2 septembre 2020; Nice, France), Commanditaire Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2020 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. XLIII-B4 Projets : UrbaRiskLab / November, Valérie Importance : pp 795 - 801 Format : 21 x 30 cm Note générale : bibliographie This research work has been granted by the Urba Risk Lab(URL) project4. The hydraulic simulation data has been provided by the PICS research project, funded by the French national research agency (ANR), grant number ANR-17-CE03-0011 Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] analyse géovisuelle [Termes descripteurs IGN] cohérence des données [Termes descripteurs IGN] couleur à l'écran [Termes descripteurs IGN] données hydrographiques [Termes descripteurs IGN] inondation [Termes descripteurs IGN] modèle de simulation [Termes descripteurs IGN] QGIS [Termes descripteurs IGN] risque naturel [Termes descripteurs IGN] style cartographique [Termes descripteurs IGN] zone inondable [Vedettes matières IGN] Géovisualisation Résumé : (auteur) We present our contribution to the geovisualization and visual analysis of hydraulic simulation data, based on an interdisciplinary research work undertaken by researchers in geographic information sciences and in hydraulics. The positive feedback loop between researchers favored the proposal of visualization tools enabling visual reasoning on hydraulic simulated data so as to infer knowledge on the simulation model. We interactively explore and design 2D multi-scale styles to render hydraulic simulated data, in order to support the identification over large simulation domains of possible local inconsistencies related to input simulation data, simulation parameters or simulation workflow. Models have been implemented into QGIS and are reusable for other input data and territories. Numéro de notice : C2020-012 Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.5194/isprs-archives-XLIII-B4-2020-795-2020 date de publication en ligne : 25/08/2020 En ligne : https://doi.org/10.5194/isprs-archives-XLIII-B4-2020-795-2020 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95532

GIS approach to publishing commonfacilities plans of land consolidation in the Czech Republic / Arnošt Müller in Geodetski vestnik, vol 62 n° 4 (December 2018 - February 2019)  

Public [article]  inGeodetski vestnik > vol 62 n° 4 (December 2018 - February 2019) . - pp 641 - 656 Titre : GIS approach to publishing commonfacilities plans of land consolidation in the Czech Republic Type de document : Article/Communication Auteurs : Arnošt Müller, Auteur Année de publication : 2018 Article en page(s) : pp 641 - 656 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes descripteurs IGN] base de données foncières [Termes descripteurs IGN] base de données localisées [Termes descripteurs IGN] cadastre étranger [Termes descripteurs IGN] changement climatique [Termes descripteurs IGN] données environnementales [Termes descripteurs IGN] données hydrographiques [Termes descripteurs IGN] érosion [Termes descripteurs IGN] modèle orienté objet [Termes descripteurs IGN] normalisation [Termes descripteurs IGN] paysage agricole [Termes descripteurs IGN] remembrement agricole [Termes descripteurs IGN] République Tchèque Résumé : (auteur) This paper introduces the process of land consolidation and current use of geographic information systems (GIS) in the Czech Republic. Contemporary land consolidation in the Central European region, unlike Western Europe, has been implemented relatively recently, hence there is no contingency or previous experience to build upon. This brings about an opportunity for a modern design of GIS‐based land consolidation. Although the design of land consolidation projects in the Czech Republic is mainly conducted in CAD software, this paper focuses on the utilisation of GIS and stresses the importance of standardisation of land consolidation data. Standardisation allows automatic processing of data as well as effortless publishing. The author proposes a new object‐oriented data model of the landscape plan (Common Facilities Plan), which allows for the storing of such plans in a central spatial database and adding attribute information to each object, thus providing analysis of the data in a GIS. The data model alongside data standardisation lays the groundwork for the architectural proposal of a new GIS (geoportal) of Common Facilities Plans. Numéro de notice : A2019-017 Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.15292/geodetski-vestnik.2018.04.641-656 date de publication en ligne : 03/12/2018 En ligne : https://doi.org/10.15292/geodetski-vestnik.2018.04.641-656 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91631 [article]

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High fidelity / Penelope Richardson in GEO: Geoconnexion international, vol 15 n° 7 (July - August 2016)

Public [article]  inGEO: Geoconnexion international > vol 15 n° 7 (July - August 2016) . - pp 38 - 41 Titre : High fidelity Type de document : Article/Communication Auteurs : Penelope Richardson, Auteur Année de publication : 2016 Article en page(s) : pp 38 - 41 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes descripteurs IGN] données hydrographiques [Termes descripteurs IGN] image à très haute résolution [Termes descripteurs IGN] image satellite [Termes descripteurs IGN] risque de pollution [Termes descripteurs IGN] sécurité [Termes descripteurs IGN] surveillance Résumé : (éditeur) Penelope Richardson looks at some of the newest applications of very high resolution satellite imagery in the maritime sector Numéro de notice : A2016-501 Thématique : IMAGERIE/POSITIONNEMENT Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81524 [article]

Mapping and characterization of hydrological dynamics in coastal marsh using high temporal resolution Sentinel-1 images / Cécile Cazals in Remote sensing, vol 8 n° 7 (July 2016)    

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Ship shape / Christophe Dekeyne in GEO: Geoconnexion international, vol 15 n° 7 (July - August 2016)

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An evaluation of unsupervised and supervised learning algorithms for clustering landscape types in the United States / Jochen Wendel in Cartography and Geographic Information Science, Vol 43 n° 3 (June 2016)  

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Etude photogrammétrique du dispositif V10 - Trimble / Tristan Postadjian (2014) 

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A method to generalize stream flowlines in small-scale maps by a variable flow-based pruning threshold / Michael Tinker in Cartography and Geographic Information Science, vol 40 n° 5 (November 2013)  

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HyMeX, les campagnes de mesures : focus sur les événements extrêmes en Méditerranée / Véronique Ducrocq in La Météorologie, n° 80 (février 2013)    

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L'océan à la carte : le recueil des données en mer et ses applications / G. Theuillon in XYZ, n° 121 (décembre 2009 - février 2010)

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Spatially explicit modeling of phosphorus emissions: integrating GIS and remote sensing for hydrological modelling / H. Klug in Geoinformatics, vol 11 n° 8 (01/12/2008)

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Standards in practice, part 7: S-57 IHO Transfer Standard for digital hydrographic data / G. Spoelstra in Geoinformatics, vol 11 n° 3 (01/04/2008)

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NOAA operational hydrological products derived from the Advanced Microwave Sounding Unit / R.R. Ferraro in IEEE Transactions on geoscience and remote sensing, vol 43 n° 5 (May 2005)

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