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Untersuchungen zur Lösung der fixen gravimetrischen Randwertprobleme mittels sphäroidaler und Greenscher Funktionen / C.T. Nguyen (1993)
Titre : Untersuchungen zur Lösung der fixen gravimetrischen Randwertprobleme mittels sphäroidaler und Greenscher Funktionen Titre original : [Etudes sur la résolution du problème des valeurs aux limites fixes à l'aide des fonctions sphéroïdales et des fonctions de Green] Type de document : Thèse/HDR Auteurs : C.T. Nguyen, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 1993 Collection : DGK - C Sous-collection : Dissertationen num. 399 Importance : 107 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9444-4 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] champ de pesanteur terrestre
[Termes IGN] espace de Hilbert
[Termes IGN] fonction harmonique
[Termes IGN] géodésie différentielle
[Termes IGN] géoïde
[Termes IGN] gravimétrie
[Termes IGN] identité de Green
[Termes IGN] problème des valeurs limites
[Termes IGN] sphère des fixes
[Termes IGN] sphèroïdeIndex. décimale : 30.40 Géodésie physique Résumé : (Auteur) Studies for solving the fixed gravimetric boundary value problems by means of spheroidal and Green's functions. In the present study the fixed gravimetric boundary value problems are considered for the exterior as well as for the interior domain of the earth. First of all existence and uniqueness of the solution are studied. For the solution theory the oblique Green's functions and the separable harmonic basis functions are generally discussed. The oblique derivative boundary operator is represented on the topography. A permissible reference density and the normal gravity field are derived from the equipotential earth spheroid. Based upon this the boundary value problems are solved by means of the spheroidal and Green's functions. The solutions are subsequently represented in the Hilbert space with reproducing kernel and the integral formulae on the earth spheroid are investigated with respect to the numerical aspects. The appendices give an overview of the special functions and the explicit representation of the infinite sums used in this study. Numéro de notice : 61575 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=60953 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 61575-01 30.40 Livre Centre de documentation Géodésie Disponible Untersuchungen zur Lösung der fixen gravimetrischen Randwertprobleme mittels sphäroidaler und Greenscher Funktionen / N. Thong (1993)
Titre : Untersuchungen zur Lösung der fixen gravimetrischen Randwertprobleme mittels sphäroidaler und Greenscher Funktionen Titre original : Studies for solving the fixed gravimetric boundary value problems by means of spheroidal and Green's functions Type de document : Thèse/HDR Auteurs : N. Thong, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 1993 Collection : DGK - C Sous-collection : Dissertationen num. 399 Importance : 107 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9444-4 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] analyse harmonique
[Termes IGN] champ de pesanteur terrestre
[Termes IGN] espace de Hilbert
[Termes IGN] fonction de Green
[Termes IGN] problème des valeurs limites
[Termes IGN] sphèroïdeIndex. décimale : 30.40 Géodésie physique Résumé : (Auteur)Studies for solving the fixed gravimetric boundary value problems by means of spheroidal and Green's functions
In the present study the fixed gravimetric boundary value problems are considered for the exterior as well as for the interior domain of the earth.
First of all existence and uniqueness of the solution are studied. For the solution theory the oblique Green's functions and the separable harmonic basis functions are generally discussed. The oblique derivative boundary operator is represented on the topogaphy.
A permissible reference density and the normal gravity field are derived from the equipotential earth spheroid. Based upon this the boundary value problems are solved by means of the spheroidal and Green's functions. The solutions are subsequently represented in the Hilbert space with reproducing kernel and the integral formulae on the earth spheroid are investigated with respect to the numerical aspects.
The appendices give an overview of the special functions and the explicit representation of the infinite sums used in this study.Numéro de notice : 28081 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=63428 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 28081-01 30.40 Livre Centre de documentation Géodésie Disponible 28081-02 30.40 Livre Centre de documentation Géodésie Disponible Genauigkeitsanalyse inertialer Vermessungssysteme mit fahrzeugfesten Sensoren / Daniel Schröder (1992)
Titre : Genauigkeitsanalyse inertialer Vermessungssysteme mit fahrzeugfesten Sensoren Titre original : [Analyse de la précision d'un système de mesure inertiel avec des capteurs de robot] Type de document : Thèse/HDR Auteurs : Daniel Schröder, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 1992 Collection : DGK - C Sous-collection : Dissertationen num. 391 Importance : 148 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9437-6 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] accéléromètre
[Termes IGN] centrale inertielle
[Termes IGN] état de l'art
[Termes IGN] gyromètre
[Termes IGN] lever inertielIndex. décimale : 30.64 GPS et centrales inertielles Résumé : (Auteur) Analysis of the Accuracy of Strapdown Inertial Surveying Systems Within this thesis different quantities effecting the accuracy of geodetic positioning by means of an inertial strapdown-system are analysed. The inertial sensors are the starting point of the theoretical analysis. Detailed models of a pendulous accelerometer, a rate integrating gyro and a ringlasergyro are introduced and discussed as examples of the method of the mathematical modelling. The transformations between the reference frames, which have to be realized for the implementation of the model equation of inertial positioning, are discussed with regard to today's state-of-the-art sensor technology. To obtain an overview of the behaviour of the solutions of the differential equations simplified as result of the above-mentioned discussion, the stability of the linearized equations are analysed, using analytical as well as numerical methods. Nevertheless, in the case at hand of a time-variable system, only restricted statements based on the linearized equations are possible. Hence in the extensive simulations carried out the nonlinear model equations were used. In particular, the effect of different sensor parameters on position and orientation are simulated for trajectories of different dynamics. For adapting the course and the dynamics of the trajectories, observed data is used. Furthermore, the results obtained using a simple compensation algorithm are presented. Finally, the appendix contains a detailed representation of the nonlinear and linear system equations for different parametrisations of both the translation and the rotation. Numéro de notice : 28083 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=63430 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 28083-01 30.64 Livre Centre de documentation Géodésie Disponible Introduction of absolute gravimetric techniques into a high-precision gracity and vertical control system in Northern Iceland / Wolfgang Torge (1992)
Titre : Introduction of absolute gravimetric techniques into a high-precision gracity and vertical control system in Northern Iceland Type de document : Monographie Auteurs : Wolfgang Torge, Auteur ; T. Grote, Auteur ; R.H. Roder, Auteur ; M. Schnull, Auteur ; H.G. Wenzel, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 1992 Collection : DGK - B Sous-collection : Angewandte Geodäsie num. 297 Importance : 52 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-8581-7 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] déformation verticale de la croute terrestre
[Termes IGN] gravimètre absolu
[Termes IGN] Islande
[Termes IGN] réseau altimétrique local
[Termes IGN] réseau gravimétrique
[Termes IGN] système de référence géodésique
[Termes IGN] volcanIndex. décimale : 30.43 Travaux de géodésie physique Résumé : (Auteur) Since 1938 gravity measurements were carried out in northern Iceland to investigate the tectonic process connected with the diverging of the Eurasian and the North American Plate. This paper describes the measurements performed by Institut für Erdmessung, Universität Hannover in 1985 and 1987/88. In the last epoch 1987/88, the absolute gravimeter JILAG-3 was first employed in order to contribute to the gravimetric datum and to overcome the calibration problem being inherent to the relative gravimetric technique. The detail survey in 1985 and 1987 was carried out using four to six LaCoste&Romberg gravimeters. By establishing four absolute stations in the control area in northern Iceland, and one in Reykjavik, the absolute gravity datum and the linear calibration could be verified on the 0.05 to 0.1 µms-2 and the 1-10-4 level, respectively. The mean relative network accuracy in 1985 (with respect to a constrained base station) and the mean absolute accuracy in 1987/88 is estimated to be ±0.06 /µms-2. As in former surveys, gravimetry was supplemented by geometric leveling. The tectonic activity in the Krafia fissure zone of northern Iceland has remarkably decreased in the beginning of the 1980's. The results of the 1985 and 1987/88 surveys indicate that the minor tectonic event which occurred in 1984 together with lava outflow, caused small variations with a range of about 20 km around the Krafia central volcano, reaching maximum changes of 0.4 µms-2 in gravity and 0.2 m in height compared to the 1980/81 surveys. The general tendency, gravity increase and subsidence in the activity center (Namafjall/Krafla area), and correlated gravity decrease and uplift at the flanks, is still visible. Numéro de notice : 30656 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=56853 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 30656-01 30.43 Livre Centre de documentation Géodésie Disponible Lösung des fixen geodätischen Randwertproblems mit Hilfe der Randelementmethode / R. Klees (1992)
Titre : Lösung des fixen geodätischen Randwertproblems mit Hilfe der Randelementmethode Titre original : [Solution du problème géodésique de valeurs aux limites à l'aide de la méthode des éléments résiduels] Type de document : Thèse/HDR Auteurs : R. Klees, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 1992 Collection : DGK - C Sous-collection : Dissertationen num. 382 Importance : 314 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9428-4 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] discrétisation
[Termes IGN] équation intégrale
[Termes IGN] linéarisation
[Termes IGN] problème des valeurs limitesIndex. décimale : 30.40 Géodésie physique Résumé : (Auteur)The présent study deals with thé numerical solution of thé fixed geodetic boundary value problem (bvp) using thé boundary élément method. Assuming a continuous covering of thé Earth's surface with gravity values thé mathematical formulation leads to a nonlinear outer bvp for thé Laplace-operator in three dimensional euclidean space.
The theoretical part starts in section 1 with some of thé most important mathematical foundations we need such as properties of boundary surfaces embedded in R3, strongly singular surface intégrais, some aspects of thé theory of pseudodifferential operators and singular intégral operators forming thé theoretical frame for thé whole convergence analysis and finally some détails from thé theory of (bivariate) spline functions. Section 2 contains thé mathematical formulation of thé fixed geodetic bvp and gives a short overview over known geodetic literatures concerning this problem. Local existence and uniqueness assertions both in Hôlder and Sobolev spaces are given based on thé implicit function theorem of Hildebrandt and Graves. Besides, thé convergence of a perturbation expansion is shown based on an idea of Jorge (1987) leading to a constructive method for thé solution of thé nonlinear problem in Hôlder spaces. In both cases thé nonlinear problem is transformed into a séries of linear ones which can be classified as oblique bvps. Under thé assumption of their regularity thé Fredholm alternative is valid not only in thé case of Hôlder spaces but also in Sobolev spaces so that uniqueness implies existence. The uniqueness can be proved in both cases using thé generalized maximum principle of Hopf. The very restrictive requirement F e C3 in thé case of Sobolev spaces can be weakened under some suppositions so that F e G1*" is sufficient to apply thé maximum principle. Therefore thé nonlinear fixed bvp can be solved iteratively where in each step a classi-cal oblique bvp arises being thé subject of thé next sections.
Both direct and indirect methods are discussed in section 4 to transform thé oblique boundary value prob-lem into an intégral équation leading to équations of différent types like strongly singular or hypersingular équations of thé second kind depending on thé methods used. It is shown that thé strongly singular intégral équation resulting from thé représentation of thé unknown disturbing potential as single layer potential is thé most appropriate one especially from thé numerical point of view. The principal symbol of this intégral operator is determined and it is proved that our intégral operator is strongly elliptic if and only if thé oblique direction is never tangential to thé Earth's surface, i.e. thé strong ellipticity is not automatically fulfilled by our intégral operator but has to be demanded explicitly.
For thé transformation of thé intégral équation into a finite dimensional lirfear System différent discreti-zation methods are disussed in section 5 like allocation, Galerkin and least squares. It is shown that GalerkinBubnov discretization is thé best compromise between thé numerical effort, thé properties of thé boundary intégral operator to assure thé convergence of thé discretization procédure and thé order of convergence. For thé convergence of thé GalerkinBubnov method we need thé strong ellipticity of thé boundary intégral operator bringing on thé coerciveness in thé form of a Garding's inequality being thé starting point for thé whole convergence analysis. Section 6 contains thé définition of thé boundary élément method including thé pros and cons in relation to finite élément methods, thé définition of thé test and trial functions consisting of polynomial finite élément functions on thé boundary. Besides, thé coefficients of thé linear System for GalerkinBubnov discretization using piecewise constant test and trial functions are derived. In section 7 a nearly complète error analysis in Sobolev spaces is given, considering both discreti-zation and numerical cubature errors and giving thé state of thé art in estimating thé influence of surface approximation errors. Under thé assumption of strong ellipticity, being équivalent to thé positive definiteness of thé principal symbol of thé boundary intégral operator, it is shown that ail Galerkin methods are stable and converge. The asymptotic order of convergence is quasioptimal i.e. it has thé same order as thé best approximation of thé theoretical solution by our boundary élément trial functions. For piecewise constant functions a convergence of thé order 0(h2) for h-iO is proved if we measure thé error in thé Sobolev norm H''(F). This implies convergence of thé same order for thé potential in points away from thé boundary surface in any norm.
The numerical part mainly deals with thé development of efficient methods for thé approximation and représentation of parts of thé Earth's surface and of cubature formulas for calculating thé coefficients of thé linear System and thé potential in thé Earth's outer space. It is shown in section 9 that Overhauser splines and bicubic BSplines are very suitable for thé approximation and représentation of thé boundary surface and superior to many other methods. For 1 1 km2 boundary éléments this leads to mean approximation errors of approximately 810 m where larger errors are possible depending on thé roughness of thé real topography. For thé représentation of thé surface normal field it is also shown that Overhauser splines are thé most appropriate approximation especially for finer grids.
In Section 10 thé problem of efficient cubatures is considered for calculating thé coefficients of thé linear System defined by single and double intégrais over boundary éléments where both regular, weakly singular, strongly singular and quasisingular intégrais arise. Several cubature formulas for thé différent types of intégrais are considered. Extensive analytical and numerical developments show their efficiency compared with other cubature formulas used in engineering sciences. A detailed analysis shows that thé highly prob-
lematic strongly singular intégrais can be calculated analytically and that thé resulting kernel has a loga-rithmic singularity over thé whole boundary of thé fini te élément.
A local solution is calculated for a région of size 100-100 km2 using 10000 boundary éléments. The GalerkinBubnov discretization with piecewise constant trial functions leads to a dense unsymmetric linear System of thé order 10000-10000 with approximately 108 coefficients. In order to achieve a relative accuracy of at least 10'3 - 10'4 for each coefficient setting up thé linear System takes about 1 CPU-hour. In section 11.2 an efficient direct équation solver is developed based on a LUfactorization using a spécial Gaussian élimination well adapted to thé architecture of thé pipeline computer Siemens/Fujitsu VP 400-EX resp. S400/10. It is shown that thé time for thé I/O opérations can be reduced by minimizing thé amount of data to be transferred and by speeding up thé I/Oopérations using spécial runtime options of thé operational System and asynchronous I/O so that CPUusage and I/O opérations are done in parallel. The test compu-tations show that thé linear System mentioned before can be solved in approximately 10.5 resp. 7 minutes corresponding to a performance of 1.1 resp. 1.6 GFLOPS. In section 11.4 thé well-conditioning of thé linear System is proved leading to a very small sensitivity against errors of thé input data; thé influence of round off errors is proved to be below 10-". The local solution is based on thé use of a degree and order 360 spherical harmonie expansion of thé gravitational potential as référence potential and thé neglect of thé outer zone. As a detailed analysis shows, this leads to large errors only near by thé boundary of thé local région and a drastic decrease of thé layer density errors with increasing distance from thé boundary so that only relative différences of thé order 10'3 10'5 occur in most parts of our local région.
In section 12 thé calculation of thé gravitational potential in points of thé Earth's outer space is considered. Efficient cubatures for thé numerical calculation of thé single layer potential are developed especially for points near by thé Earth's surface, and they are compared with other cubatures used in engineering sciences. The results show that such formulas can be found based on spécial parameter transformations smoothing out thé strong variation of thé integrand in points near by both thé Earth's surface and thé boundary of thé fmite élément. '
Section 13 contains some proposais for future work which has to be done in relation to thé numerical sol-ution of thé fixed geodetic bvp and thé boundary élément method.Numéro de notice : 28089 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=63436 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 28089-01 30.40 Livre Centre de documentation Géodésie Disponible 28089-02 30.40 Livre Centre de documentation Géodésie Disponible Modelle und Algorithmen für das Facetten-Stereosehen / M. Weisensee (1992)PermalinkModellierung geometrisch-topologischer Daten zur Beschreibung und Berechnung netzartiger und flächenhafter Strukturen / M. Neureither (1992)PermalinkNeue Verfahren zur Kombination heterogener Daten bei der Bestimmung des Erdschwerefeldes / B. Middel (1992)PermalinkOptimierung geodätischer Netze mit spektralen Zielfunktionen / H. Kaltenbach (1992)PermalinkRelativistic motion of gyroscopes and space gradiometry / E. Gill (1992)PermalinkReport on the Symposium of the IAG Subcommission for the European Reference Frame (EUREF) held in Florence 28-31 May 1990 & report on the working session of the IAG Subcommission for the European Reference Frame (EUREF) held in Vienna 14-16 August 1991 & report on the Symposium of the IAG Subcommission for the European Reference Frame (EUREF) held in Berne 4-6 March 1992, EUREF publication n° 1 / Erich Gubler (1992)PermalinkUntersuchungen verschiedener Höhensysteme, dargestellt an einer Testschleife in Rheinland-Pfalz / M. Leismann (1992)PermalinkZur Integration von Vektor- und Rasterdaten in Geo-Informationssystemen / H. Yang (1992)PermalinkAnalyse von Lasermessungen zum Mond im Rahmen einer post-Newton'schen Theorie / J. Muller (1991)PermalinkAufbau eines geodätischen Strapdown Inertialsystems zur Punktbestimmung / D. Keller (1991)PermalinkEin klassifizierender Beitrag zur Abbildungstheorie und numerischen Genauigkeit von geodätischen Datumsübergängen / R. Schreiber (1991)PermalinkEin Verfahren zur Rekonstruktion von dreidimensionalen Objektmodellen aus digitalen Bilddaten / B. Straub (1991)PermalinkEine analytische Lösung kanonischer Gleichungen der geodätischen Linie zur Transformation ellipsoidischer Flächenkoordinaten / J. Klotz (1991)PermalinkEine approximative Lösung der fixen gravimetrischen Randwertaufgabe im Innen- und Außenraum der Erde / J. Engels (1991)PermalinkEphemeridenrechnung und Bahnbestimmung geostationärer Satelliten mit Hilfe der Taylorreihenintegration / Oliver Montenbruck (1991)PermalinkInteraktiver Aufbau hochqualitativer digitaler Geländemodelle an photogrammetrischen Stereosystemen / Wolfgang Reinhardt (1991)PermalinkKonzeption eines modularen Echtzeit-Systems für Laserentfernungsmessungen unter besonderer Berücksichtigung der Aufwärtskompatibilität / R. Dassing (1991)PermalinkNational report of the Federal Republic of Germany on the geodetic activities in the years 1987 to 1991 / Erik W. Grafarend (1991)PermalinkNicht-gravitative Störeinflüsse bei der Modellierung von GPS-Erdumlaufbahnen / J. Feltens (1991)PermalinkObjektgestützte Mehrbildzuordnung / Chantal Schneider (1991)PermalinkPhotogrammetrische Punktbestimmung mit Bilddaten digitaler Dreizeilenkameras / F. Muller (1991)PermalinkQualitätssteigerung der automatischen Höhenmessung in Stereobildern durch flächenbasierte Kernlinienkorrelation / J. Piechel (1991)PermalinkRaumbezogene Informationssysteme und digitale Geländemodelle / D. Frisch (1991)PermalinkStatistische Verfahren für die automatische Bildanalyse und ihre Bewertung bei der Objekterkennung und -vermessung / Wolfgang Förstner (1991)PermalinkWissensgestützte digitale Bildkoordinatenmessung in aberrationsbehafteten Meßbildern / A. Meid (1991)PermalinkZur Datumsfestlegung und Short-Arc Bahnverbesserung bei der Auswertung von GPS-Beobachtungen / Detlef Angermann (1991)PermalinkZur Systematisierung der Seilnetzberechnung und zur Optimierung von Seilnetzen / J. Bahndorf (1991)PermalinkArbeiten zum Thema "Inertialschwere" / Rudolf Sigl (1990)PermalinkDGK-Arbeitskreis für Rezente Krustenbewegungen / H. Malzer (1990)PermalinkDie Bewegung künstlicher Satelliten im anisotropen Gravitationsfeld einer gleichmäßig rotierenden starren Modellerde. Eine analytische Lösung 2. Ordnung / C. Cui (1990)PermalinkEin relativistisches Modell für PRARE-Beobachtungen / M. Schmidt (1990)PermalinkErfassung unsteter Oberflächen aus digitalen Bilddaten durch Flächen- und Kantenzuordnung / R. Li (1990)PermalinkIntegration von Bildzuordnung, Punktbestimmung, Oberflächenrekonstruktion und Orthoprojektion innerhalb der digitalen Photogrammetrie / Christian Heipke (1990)PermalinkIntegrierte Ausgleichung geodätischer Netze im Massenpunktmodell / T. Muller (1990)PermalinkKinematische Positionsbestimmung für die Aerotriangulation mit dem NAVSTAR Global Positioning System / P. Friess (1990)PermalinkTheoretische und experimentelle Genauigkeitsuntersuchungen für ein optisches Positionsmeßsystem zur hochgenauen Vermessung von bewegten Objekten / Peter Krzystek (1990)PermalinkUntersuchung zum rationellen Einsatz des GPS in kleinräumigen Netzen / H.J. Euler (1990)PermalinkUntersuchungen zum Trilaterationsproblems {4,4,1,1} / O. Giering (1990)PermalinkZur Energie der Chandler Polschwankung / H. Lenhardt (1990)PermalinkZur Maßstabsüberwachung von Invarbandnivellierlatten mittels Dehnungsmeßstreifenmeßtechnik / J. Riehl (1990)PermalinkBerechnung minimaler Wertebereiche von Punktlagen in räumlichen Netzen aus vorgegebenen Toleranzen der Beobachtungen / H.O. Schmidbauer (1989)PermalinkBestimmung von Parametern des Erde-Mond-Systems / Rainer Bauer (1989)PermalinkCovariance propagation from GEM-L2 and GRIM-3M1P to TOPEX and ERS-1 orbits / J. Klokocnik (1989)PermalinkDigitale Erzeugung von Perspektivbildern / H. Kuhn (1989)PermalinkEinsatz von CCD-Kameras zur differentiellen Entzerrung photogrammetrischer Aufnahmen / F.J. Behr (1989)Permalink