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Termes IGN > sciences naturelles > sciences de la Terre et de l'univers > géosciences > géophysique interne > géodésie > projection
projectionSynonyme(s)représentation plane ;projection plane ;projection cartographique cartographie mathématique |
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Some equal-area, conformal and conventional map projections: a tutorial review / Ebrahim Ghaderpour in Journal of applied geodesy, vol 10 n° 3 (September 2016)
[article]
Titre : Some equal-area, conformal and conventional map projections: a tutorial review Type de document : Article/Communication Auteurs : Ebrahim Ghaderpour, Auteur Année de publication : 2016 Article en page(s) : pp 197 – 209 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections
[Termes IGN] projection conforme
[Termes IGN] projection de Gauss
[Termes IGN] projection équivalente
[Termes IGN] projection Universal Transverse MercatorRésumé : (auteur) Map projections have been widely used in many areas such as geography, oceanography, meteorology, geology, geodesy, photogrammetry and global positioning systems. Understanding different types of map projections is very crucial in these areas. This paper presents a tutorial review of various types of current map projections such as equal-area, conformal and conventional. We present these map projections from a model of the Earth to a flat sheet of paper or map and derive the plotting equations for them in detail. The first fundamental form and the Gaussian fundamental quantities are defined and applied to obtain the plotting equations and distortions in length, shape and size for some of these map projections. Numéro de notice : A2016-971 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/jag-2015-0033 En ligne : https://doi.org/10.1515/jag-2015-0033 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83678
in Journal of applied geodesy > vol 10 n° 3 (September 2016) . - pp 197 – 209[article]A new computerized ionosphere tomography model using the mapping function and an application to the study of seismic-ionosphere disturbance / Jian Kong in Journal of geodesy, vol 90 n° 8 (August 2016)
[article]
Titre : A new computerized ionosphere tomography model using the mapping function and an application to the study of seismic-ionosphere disturbance Type de document : Article/Communication Auteurs : Jian Kong, Auteur ; Yi Bin Yao, Auteur ; Lei Liu, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 741 – 755 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] altération
[Termes IGN] correction troposphérique
[Termes IGN] International Reference Ionosphere
[Termes IGN] Japon
[Termes IGN] séisme
[Termes IGN] teneur totale en électrons
[Termes IGN] tomographie
[Termes IGN] troposphèreRésumé : (auteur) A new algorithm for ionosphere tomography using the mapping function is proposed in this paper. First, the new solution splits the integration process into four layers along the observation ray, and then, the single-layer model (SLM) is applied to each integration part using a mapping function. Next, the model parameters are estimated layer by layer with the Kalman filtering method by introducing the scale factor (SF) γ to solve the ill-posed problem. Finally, the inversed images of different layers are combined into the final CIT image. We utilized simulated data from 23 IGS GPS stations around Europe to verify the estimation accuracy of the new algorithm; the results show that the new CIT model has better accuracy than the SLM in dense data areas and the CIT residuals are more closely grouped. The stability of the new algorithm is discussed by analyzing model accuracy under different error levels (the max errors are 5TECU, 10TECU, 15TECU, respectively). In addition, the key preset parameter, SFγ, which is given by the International Reference Ionosphere model (IRI2012). The experiment is designed to test the sensitivity of the new algorithm to SF variations. The results show that the IRI2012 is capable of providing initial SF values. Also in this paper, the seismic-ionosphere disturbance (SID) of the 2011 Japan earthquake is studied using the new CIT algorithm. Combined with the TEC time sequence of Sat.15, we find that the SID occurrence time and reaction area are highly related to the main shock time and epicenter. According to CIT images, there is a clear vertical electron density upward movement (from the 150-km layer to the 450-km layer) during this SID event; however, the peak value areas in the different layers were different, which means that the horizontal movement velocity is not consistent among the layers. The potential physical triggering mechanism is also discussed in this paper. Compared with the SLM, the RMS of the new CIT model is improved by 16.78%, while the CIT model could provide the three-dimensional variation in the ionosphere. Numéro de notice : A2016-504 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-016-0906-9 En ligne : http://dx.doi.org/10.1007/s00190-016-0906-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81528
in Journal of geodesy > vol 90 n° 8 (August 2016) . - pp 741 – 755[article]Computation and visualisation of the accuracy of old maps using differential distortion analysis / Manuel Claeys Boùùaert in International journal of geographical information science IJGIS, vol 30 n° 7- 8 (July - August 2016)
[article]
Titre : Computation and visualisation of the accuracy of old maps using differential distortion analysis Type de document : Article/Communication Auteurs : Manuel Claeys Boùùaert, Auteur ; Bernard De Baets, Auteur ; Soetkin Vervust, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 1255 - 1280 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie
[Termes IGN] cartographie ancienne
[Termes IGN] cartographie numérique
[Termes IGN] Déformation
[Termes IGN] distorsion d'image
[Termes IGN] indicatrice de Tissot
[Termes IGN] point d'appui
[Termes IGN] projection
[Termes IGN] visualisationRésumé : (Auteur) The accuracy of old maps can hold interesting historical information, and is therefore studied using distortion analysis methods. These methods start from a set of ground control points that are identified both on the old map and on a modern reference map or globe, and conclude with techniques that compute and visualise distortion. Such techniques have advanced over the years, but leave room for improvement, as the current ones result in approximate values and a coarse spatial resolution. We propose a more elegant and more accurate way to compute distortion of old maps by translating the technique of differential distortion analysis, used in map projection theory, to the setting where an old map and a reference map are directly compared. This enables the application of various useful distortion metrics to the study of old maps, such as the area scale factor, the maximum angular distortion and the Tissot indicatrices. As such a technique is always embedded in a full distortion analysis method we start by putting forward an optimal analysis method for a general-purpose study, which then serves as the foundation for the development of our technique. There to, we discuss the structure of distortion analysis methods and the various options available for every step of the process, including the different settings in which the old map can be compared to its modern counterpart, the techniques that can be used to interpolate between both, and the techniques available to compute and visualise the distortion. We conclude by applying our general-purpose method, including the differential distortion analysis technique, to an example map also used in other literature. Numéro de notice : A2016-305 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2015.1127377 En ligne : http://dx.doi.org/10.1080/13658816.2015.1127377 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80903
in International journal of geographical information science IJGIS > vol 30 n° 7- 8 (July - August 2016) . - pp 1255 - 1280[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-2016042 RAB Revue Centre de documentation En réserve L003 Disponible 079-2016041 RAB Revue Centre de documentation En réserve L003 Disponible Empirical methods of reducing the observations in geodetic networks / Roman Kadaj in Geodesy and cartography, vol 65 n° 1 (June 2016)
[article]
Titre : Empirical methods of reducing the observations in geodetic networks Type de document : Article/Communication Auteurs : Roman Kadaj, Auteur Année de publication : 2016 Article en page(s) : pp 13 - 40 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] compensation de coordonnées
[Termes IGN] ligne géodésique
[Termes IGN] projection Universal Transverse Mercator
[Termes IGN] réductionRésumé : (Auteur) The paper presents empirical methodology of reducing various kinds of observations in geodetic network. A special case of reducing the observation concerns cartographic mapping. For numerical illustration and comparison of methods an application of the conformal Gauss-Krüger mapping was used. Empirical methods are an alternative to the classic differential and multi-stages methods. Numerical benefits concern in particular very long geodesics, created for example by GNSS vectors. In conventional methods the numerical errors of reduction values are significantly dependent on the length of the geodesic. The proposed empirical methods do not have this unfavorable characteristics. Reduction value is determined as a difference (or especially scaled difference) of the corresponding measures of geometric elements (distances, angles), wherein these measures are approximated independently in two spaces based on the known and corresponding approximate coordinates of the network points. Since in the iterative process of the network adjustment, coordinates of the points are systematically improved, approximated reductions also converge to certain optimal values. Numéro de notice : A2016-636 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/geocart-2016-0001 En ligne : http://dx.doi.org/10.1515/geocart-2016-0001 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81839
in Geodesy and cartography > vol 65 n° 1 (June 2016) . - pp 13 - 40[article]Generalization of the Lambert–Lagrange projection / Sebastian Orihuela in Cartographic journal (the), Vol 53 n° 2 (May 2016)
[article]
Titre : Generalization of the Lambert–Lagrange projection Type de document : Article/Communication Auteurs : Sebastian Orihuela, Auteur Année de publication : 2016 Article en page(s) : pp 158 - 165 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections
[Termes IGN] projection conforme
[Termes IGN] projection conforme de Gauss
[Termes IGN] projection conforme de Lagrange
[Termes IGN] projection conforme de Lambert
[Termes IGN] projection conique
[Termes IGN] projection stéréographiqueRésumé : (Auteur) The Lagrange projection represents conformally the terrestrial globe within a circle. This is achieved by compressing the latitude and longitude and by applying the new coordinates into the equatorial stereographic projection. The same concept can be generalized to any conformal projection, although the application of this technique to other analytical functions is less known. In this work, the general Lambert–Lagrange projection formula is proposed and the application of the modified coordinates is discussed on projections: stereographic, conformal conic and Gauss–Schreiber. In general, the results are merely a curiosity, except for the case of Gauss–Schreiber, where the use of coordinates with altered scale can be applied in the optimization of conformal projections. Numéro de notice : A2016-511 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/00087041.2015.1108063 En ligne : http://dx.doi.org/10.1080/00087041.2015.1108063 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81582
in Cartographic journal (the) > Vol 53 n° 2 (May 2016) . - pp 158 - 165[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 030-2016021 RAB Revue Centre de documentation En réserve L003 Disponible Projection Wizard – An online map projection selection tool / Bojan Šavrič in Cartographic journal (the), Vol 53 n° 2 (May 2016)PermalinkEléments de géodésie et de la théorie des moindres carrés / Abdelmajid Ben Hadj Salem (février 2016)PermalinkPermalinkTrouver le Nord / Olivier Le Carrer (2016)PermalinkUser preferences for world map projections / Bojan Šavrič in Cartography and Geographic Information Science, Vol 42 n° 5 (November 2015)PermalinkDetermination of definitive standard parallels of normal aspect conic projections equidistant along meridians on an old map / Martina Triplat Horvat in International journal of cartography, vol 1 n° 1 (August 2015)PermalinkA study of projections for key point based registration of panoramic terrestrial 3D laser scan / Hamidreza Houshiar in Geo-spatial Information Science, vol 18 n° 1 (March 2015)PermalinkPermalinkThe history of cartography, Volume 6 Part 2. Cartography in the twentieth century / Mark Monmonier (2015)PermalinkRisques de projections / Françoise de Blomac in DécryptaGéo le mag, n° 162 (01/12/2014)Permalink