VIIIth International Congress of Photogrammetry: Proceedings of the Congress

Fagerholm, P. O.; Ternryd, C. O.

Bibliographic data

Multivolume work

Persistent identifier:: 1048861678

Title:: VIIIth International Congress of Photogrammetry

Sub title:: Stockholm, Sweden, July 17 - 26, 1956

Year of publication:: 1957

Place of publication:: Stockholm

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 1048861678

Language:: English

Other Title:: Paralleltitel: VIIIe Congrès International de Photogrammétrie

Editor:: Fagerholm, P. O.

Corporations:: International Congress of Photogrammetry, 8., 1956, Stockholm; Board of the VIIIth International Congress of Photogrammetry

Adapter:: International Congress of Photogrammetry, 8., 1956, Stockholm; Board of the VIIIth International Congress of Photogrammetry

Founder of work:: International Congress of Photogrammetry, 8., 1956, Stockholm; Board of the VIIIth International Congress of Photogrammetry

Other corporate:: International Congress of Photogrammetry, 8., 1956, Stockholm; Board of the VIIIth International Congress of Photogrammetry

Document type:: Multivolume work

Volume

Persistent identifier:: 1048862747

Title:: Proceedings of the Congress

Sub title:: VIIIe Congrès International de Photogrammétrie

Scope:: 399 Seiten

Year of publication:: 1957

Place of publication:: Stockholm

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 1048862747

Illustration:: Illustrationen

Signature of the source:: ZS 312(12,1)

Language:: French

Other Title:: Paralleltitel: Compte rendu du Congrès

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Contributor:: Ternryd, C. O.

Editor:: Fagerholm, P. O.

Corporations:: International Congress of Photogrammetry, 8., 1956, Stockholm; Board of the VIIIth International Congress of Photogrammetry

Adapter:: International Congress of Photogrammetry, 8., 1956, Stockholm; Board of the VIIIth International Congress of Photogrammetry

Founder of work:: International Congress of Photogrammetry, 8., 1956, Stockholm; Board of the VIIIth International Congress of Photogrammetry

Other corporate:: International Congress of Photogrammetry, 8., 1956, Stockholm; Board of the VIIIth International Congress of Photogrammetry

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: COMMISSION III [compte-rendu]

Document type:: Multivolume work

Structure type:: Chapter

217 Cette pratique simplifie considérablement le problème de la compensation tant du point de vue théorique, que dans l’exécution pratique. La compensation de la chaîne de points nadiraux d’une bande comprise entre deux couples con trôles devient similaire à la compensation d’un cheminement planimétrique à polygone rectiligne. De plus, les formules obtenues montrent que cette méthode permet de corriger simultanément les erreurs accidentelles et les erreurs systématiques constantes. Transfer of Absolute Orientation in Aerial Triangulation The absolute orientation of a stereomodel is defined by four parameters: scale, azimuth, longitudinal and lateral tilt. Along a triangulated strip these parameters are altered by each transfer from one model to the next one. The differential errors by which these parameters are disturbed in each transfer may be expressed easily as functions of the errors of the relative orientation elements of the new photopair (in the case bzi = bz% = 0), or of the orientation elements of the new air station (in the case of ordinary model connexion). If accidental errors only are considered, it is possible to express, starting from the adopted methods of relative orientation and scale transfer, the weight and correlation numbers of the setting elements of the photographs. By application of the law of propagation of errors and taking into account the previously established functions, the weight and correlation numbers of the para meters of absolute orientation can also be computed. For the practically adopted methods, it is found out that the parameters of the absolute orienta tion are uncorrelated and thus compose a combination of independant variables, which may be considered for computational purposes as a set of directly observed quantities. Application of this principle gives us a clearer understanding and a more elegant and easier procedure of aerial triangulation adjustment. Cette communication n’est suivie d’aucune discussion. La parole est ensuite donnée à M. A. Bjerhammar (Suède) qui présente: »Further Results with the Parallax Triangulation Method». Résumé: According to Bachmann the adjustment of an aerotriangulation is performed after a primary orientation procedure. In this method the orientation of the individual model is made by technical methods and finally an additional numeri cal adjustment follows for the closure conditions of the whole chain. (Bachmann: Théorie des erreurs et compensation des triangulations aériennes. Lausanne 1946) — In a later paper the author has treated the adjustment of the aero triangulation according to a new technique. (Bjerhammar: Photogrammetria II 1950—1951: 4). In this method all 'parallax conditions of the orientations as well as the closure conditions of the chain are included in a common adjustment. This means that the sum of the squares of the residual parallaxes will be equal to minimum. The method is here called parallax-triangulation. The theoretical difference between the two methods may be explained in the following way. Residual parallaxes V — Vi -j- v 2 and thus 2 VV rr 2 Vi y I -f- 2Ï V 2 Vo -f- 2 2vi v 2 where v x r= residual parallax after the primary orientation v 2 — added parallax to compensate the conditions of closure v = total residual parallax after completed adjustment. According to the method of combined adjustment there are three groups of necessary conditions to be fullfilled in order to get a minimum of the whole. 1 : o 2 Vi Vi = min 2: o 2 v 2 v 2 = min 3 : o 2 2 Vi v 2 = 0 A. Bjerhammar: Further Results with the Parallax Triangulation Method. (Publ. Ill B 2)

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