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Titre : Optimierung geodätischer Netze mit spektralen Zielfunktionen Titre original : [Optimisation des réseaux géodésiques par les fonctions spectrales recherchées] Type de document : Thèse/HDR Auteurs : H. Kaltenbach, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 1992 Collection : DGK - C Sous-collection : Dissertationen num. 393 Importance : 116 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9439-0 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] analyse spectrale
[Termes IGN] canevas
[Termes IGN] itération
[Termes IGN] matrice de covariance
[Termes IGN] mire parlante
[Termes IGN] problème inverse
[Termes IGN] réseau géodésique
[Termes IGN] système de coordonnées
[Termes IGN] système non linéaire
[Termes IGN] valeur propreIndex. décimale : 30.10 Systèmes de référence et réseaux géodésiques Résumé : (Auteur) The following thesis deals with the optimization of geodetic networks based on spectral target functions. The spectral analysis and optimization is based on the decomposition of the normal equation matrix of the adjustment or on the covariance matrix of the coordinates in the system of eigenvalues and eigenvectors. Chapter two contains some important mathematical background knowledge from the field of direct and inverse eigenvalue problems and the iterative solution of nonlinear systems of equations. Especially some properties of the newton-procedure are discussed, because this method is generally used to solve inverse eigenvalue problems. To apply the Newton-procedure it is necessary to know the derivatives of the eigenvalues and vectors of the considered matrix with respect to the design parameters. The derivatives of an arbitrary (symmetric) matrix are summarized in this chapter.
The spectral analysis of geodetic networks related to aspects of precision and reliability is the subject of chapter three. Some wellknown local and global measures for the precision are summarized shortly. Aspects concerned with the so-called inner geometry of a network and the definition of the coordinate system (datum problem) are mentioned and supplemented by examples.
The optimization with target functions related to the eigenvalue spectrum is the main part of this thesis and the subject analyzed in detail in chapter four. Principally spoken the task is to determine the coordinates of the netpoints and the observation weights in such a manner that the resulting normal equation or covariance matrix has a special target spectrum. This is the definition of the inverse eigenvalue problem. Based on a given start design of a geodetic network the target function is formulated and the inverse eigenvalue problem is solved iteratively. As mentioned above it is necessary to know the derivatives of the eigenvalues with respect to the coordinates and the observation weights. The derivatives can be computed based on the eigenvalue problem for the normal equation matrix or the covariance matrix and furthermore it is necessary to calculate the derivatives of the elements of the normal equation matrix analytically. Problems arising in network optimization like handling the orientation unknowns in direction networks or the consideration of inner geometry and datum definition of a network are discussed. Examples show the effectiveness of the optimization procedure and show how the so-called weak form of geodetic networks can be reduced. The spectral network optimization is a useful tool for understanding properties and behaviour of geodetic networks. The spectral formulation with target eigenvalues allows the solution of first, second and third order design problems in the usual classification of network optimization. The examples are also used to investigate the properties of the iterative solution procedure, especially the rate of convergence or the definiteness of solutions.
In analogy to the eigenvalues, one can define an inverse eigenvector problem : the task is to determine the design parameters -namely the coordinates and the observation weights - in such a way that the normal equation matrix has given eigenvectors. The formulation of solution procedures and the difficulties in formulating suitable target functions for eigenvectors is the topic of chapter five. One application of this topic is the field of deformation analysis, where the task is to achieve the components of the dominant eigenvector in such a manner that they are perpendicular to. the expected direction of the deformations.
To make an algorithm for network optimization a suitable tool in network planning, it is inevitable to consider some practical aspects. In the first order design, namely the determination of the coordinates of the netpoints, it is obvious that the rate of displacement of the points is limited by the local topography. One cannot move the points arbitrarily without loosing connections between the points. Therefore it is obvious to introduce the possible rate of displacement of the points as restrictions into the optimization algorithm. The same is valid for the observation weigths in a weight optimization (second order design). To take into account aspects of reliability we have to formulate upper bounds for the weights because observations with very high weights compared with other observations usually have low redundancy. Therefore in the adjustment gross errors can be found with a low probability, but unknown errors can distort the results significantly. If we take into account these practical aspects within the iterative solution procedure of the inverse eigenvalue problem we get a problem of minimizing a certain target function with additional restrictions in the form of equations and unequations. There are several methods in optimization theory for solving such problems. Chapter six of the present thesis deals with this topic. Again examples are used to supplement the theoretical investigations.Numéro de notice : 61414 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=60937 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 61414-01 30.10 Livre Centre de documentation Géodésie Disponible 61414-02 30.10 Livre Centre de documentation Géodésie Disponible
Titre : La petite compagnie : au hasard des souvenirs des derniers arpenteurs de l'IGN Type de document : Monographie Auteurs : Association des personnels retraités de l'IGN, Auteur Editeur : St-Mandé : Association des Personnels Retraités de l'Institut Géographique National APRIGN Année de publication : 1992 Importance : 284 p. Format : 14 x 22 cm ISBN/ISSN/EAN : 978-2-9507031-0-1 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Histoire IGN
[Termes IGN] arpentage
[Termes IGN] géodésie
[Termes IGN] historique
[Termes IGN] Institut géographique national (France)
[Termes IGN] terrain
[Termes IGN] topographieNuméro de notice : 60723 Affiliation des auteurs : non IGN Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=60792 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 60723-01 42.40 Livre Centre de documentation Histoire Disponible 60723-02 42.40 Livre Centre de documentation Histoire Disponible 60723-03 42.40 Livre Centre de documentation Histoire Disponible 60723-04 42.40 Livre Centre de documentation Histoire Disponible
Titre : Quantitative characterization of cartographic lines for generalization Type de document : Monographie Auteurs : M.C. Bernhardt, Auteur Editeur : Colombus (Ohio) : Ohio State University Année de publication : 1992 Collection : Department of Geodetic Science and Surveying Reports num. 425 Importance : 142 p. Format : 21 x 27 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] généralisation cartographique automatisée
[Termes IGN] ligne caractéristique
[Vedettes matières IGN] GénéralisationRésumé : (Auteur) This report addresses the problem of the quantitative characterization of caviii could potentially capture qualities of a curve traced out on a plane, such as how the curve meanders and the degree of jaggedness, are investigated. In particular, the following are described: fractal measures, angle measures, curvilinearity measures, and distances from baselines Next, a variety of lines from 1:24,000 scale USGS maps, along with their manual generalizations and analytical simplifications, are evaluated using the described measures. The results are analyzed in the context of generalization for two reasons - (1) to study how the measures change as a line is generalized, and (2) to consider the degree to which the measures actually do characterize cartographic lines, and consequently, the extent to which the measures can potentially be used to guide the process of generalization. Patterns revealed in the results of measuring the lines are discussed. Numéro de notice : 12103 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54533 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 12103-01 39.20 Livre Centre de documentation En réserve M-103 Disponible Recherches sur les possibilités cartographiques de Spot dans les zones sub-méditerranéennes / Abouberkr-Seddik Kedjar (1992)
Titre : Recherches sur les possibilités cartographiques de Spot dans les zones sub-méditerranéennes Type de document : Thèse/HDR Auteurs : Abouberkr-Seddik Kedjar, Auteur Editeur : Paris : Institut Géographique National - IGN (1940-2007) Année de publication : 1992 Importance : 203 p. Format : 21 x 30 cm Note générale : Bibliographie
Thèse de doctorat en astronomie fondamentale, mécanique céleste et géodésie, option photogrammétrieLangues : Français (fre) Descripteur : [Vedettes matières IGN] Photogrammétrie
[Termes IGN] Algérie
[Termes IGN] cartographie
[Termes IGN] cartographie topographique
[Termes IGN] détail topographique
[Termes IGN] Ghardaya (Algérie)
[Termes IGN] image SPOT-HRV
[Termes IGN] orbitographie
[Termes IGN] photogrammétrie analytique
[Termes IGN] spécification
[Termes IGN] traitement d'imageIndex. décimale : THESE Thèses et HDR Numéro de notice : 60661 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Thèse française Note de thèse : Thèse de doctorat : astronomie fondamentale, mécanique céleste et géodésie. option photogrammétrie : Champs sur Marne,ENSG : 1992 nature-HAL : Thèse DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=45845 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 60661-01 THESE Livre Centre de documentation Thèses Disponible 60661-02 THESE Livre Centre de documentation Thèses Disponible 60661-03 K321 Livre Saint-Mandé Dépôt en unité Exclu du prêt
Titre : Sciences géométriques et télédétection Type de document : Monographie Auteurs : Louis Lliboutry, Auteur Editeur : Paris : Masson Année de publication : 1992 Importance : 290 p. Format : 18 x 25 cm ISBN/ISSN/EAN : 978-2-225-82452-4 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Télédétection
[Termes IGN] cartographie
[Termes IGN] détail topographique
[Termes IGN] géodésie
[Termes IGN] navigation
[Termes IGN] observation de la Terre
[Termes IGN] photogrammétrie
[Termes IGN] satellite artificielIndex. décimale : 35.00 Télédétection - généralités Numéro de notice : 60366 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=60739 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 60366-03 35. Livre Centre de documentation Télédétection Disponible 60366-01 35.00 Livre Centre de documentation Télédétection Disponible 60366-04 35.00 Livre Centre de documentation Télédétection Disponible 60366-02 DEP-PE Livre Toulouse Dépôt en unité Exclu du prêt PermalinkPermalinkImpact du système GPS sur la topographie, stratégies à court terme et perspectives d'avenir / Pascal Willis (07/11/1991)
PermalinkCompte rendu de mission [congrès] Auto-Carto ASPRS Baltimore 25-28 mars 1991 [et] USGS Reston 29 mars 1991 / Benoit David (1991)
PermalinkEtablissement de plans topographiques au 1:5.000 (par méthode photogrammétrique) / Ministère de l'équipement, du logement et des transports (France) (1991)
PermalinkL'information topo-foncière de base à grande échelle en France / Conseil national de l'information géographique (1991)
PermalinkPermalinkProceedings of the eighth thematic conference on geologic remote sensing: Exploration, engineering and environment, Denver, Colorado, USA, April 29-May 2, 1991, 1. Volume 1 / Environmental research institute of Michigan (1991)
PermalinkProceedings of the eighth thematic conference on geologic remote sensing: Exploration, engineering and environment, Denver, Colorado, USA, April 29-May 2, 1991, 2. Volume 2 / Environmental research institute of Michigan (1991)
PermalinkPermalinkTechnical papers 1991 ACSM - ASPRS annual convention : ACSM 51st annual convention, ASPRS 56th annual convention, Volume 1. Surveying / American society for photogrammetry and remote sensing (1991)
PermalinkComparison of (7.5 minute) and (1 degree) digital elevation models / D.L. Isaacson in Photogrammetric Engineering & Remote Sensing, PERS, vol 56 n° 11 (november 1990)
PermalinkImage enhancement of Landsat Thematic Mapper data and GIS data integration for evaluation of resource characteristics / S.J. Walsh in Photogrammetric Engineering & Remote Sensing, PERS, vol 56 n° 8 (august 1990)
PermalinkEffects of topography on radiance from upland vegetation in north Wales / A.G. Thomson in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)
PermalinkAn investigation into the computational procedures of space resection by collinearity equations / T.Y. Shih in Photogrammetric record, vol 13 n° 75 (April - September 1990)
PermalinkHyperspherical direction cosine transformation for separation of spectral and illumination information in digital scanner data / G.W. Pouch in Photogrammetric Engineering & Remote Sensing, PERS, vol 56 n° 4 (april 1990)
PermalinkDifferences between ecological land type maps produced using GIS or manual cartographic methods / K.E. Lowell in Photogrammetric Engineering & Remote Sensing, PERS, vol 56 n° 2 (february 1990)
PermalinkUne approche de la détermination automatique des éléments remarquables du terrain sur des MNT réguliers / Evelyne Durand (1990)
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