VIIIth International Congress of Photogrammetry: Reprints of papers

Fagerholm, P. O.; Lycken, L. E.; Thunberg, A.; Öhlin, K. A.

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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:: 1048997812

Title:: Reprints of papers

Scope:: circa 1120 Seiten in verschiedenen Seitenzählungen

Year of publication:: 1957

Place of publication:: Stockholm

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 1048997812

Illustration:: Illustrationen

Signature of the source:: ZS 312(12,4a)

Language:: French

Other Title:: Paralleltitel: Tirages a part

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

Contributor:: Lycken, L. E.; Thunberg, A.; Öhlin, K. A.

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 II

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Instrumentation for the Integrated Photogrammetric System of the U. S. Geological Survey RUSSELL K. BEAN

Document type:: Multivolume work

Structure type:: Chapter

US.A-2 PHOTOGRAMMETRIC ENGINEERING number of years it has been generally assumed that vertical aerial photography is the most efficient medium for topographic mapping. It has long been known however, that twin low-oblique photography has certain inherent advantages which should lead to increased accuracy and economy in the cost of control and compilation of detail. Twin low-oblique photography has never been fully exploited because of the lack of suitable plotting instruments for using it, espe. cially in the aero-triangulation phase. Most of the practical applications in the past have been confined to single models. It was obvious, therefore, that one of the first goals was to develop a satisfactory plotter for both horizontal and vertical aerotriangulation of twin photography. This objective was achieved in the Twinplex plotter (described below) and the way was opened for a complete twin low-oblique photography system for precise map compilation. Having accomplished this goal, there was immediately undertaken a complete investi- gation of all of the photogrammetric processes to determine wherein improve- ments could be made. Thus, a ‘new look” in photogrammetric instruments was developed at the U. S. Geological Survey. The following glimpses of the major items in our new look may be of interest: 1. NEW LENSES AND CAMERAS The recent development of new cameras, possessing greatly improved me- chanical characteristics and equipped with high-resolution, low-distortion lenses, opens the way for improve- ment in both the photographic and geometric qualities of aerial photog- raphy. In order to obtain the maxi- mum benefit from these improve ments in camera characteristics, the Geological Survey has purchased a number of T-12 cameras (See Figure 1) equipped with Planigon lenses (based on the Topogon V designed by Herr Richter of Zeiss), for allotment to contractors on Geological Survey aerial photography projects. These cameras have been modified by the manufacturer to incorporate certain Fic. 1. T-12 aerial camera. desirable features, such as additional fiducial marks and a device which in- dicates vacuum failure at the platen, thereby making the resultant photography more efficient for mapping purposes. 2. MULTI-COLLIMATOR CAMERA CALIBRATOR As a further step in controlling the characteristics of cameras used on Geo- logical Survey projects, the Survey has installed a multi-collimator camera cali- brator (See Figure 2), by means of which cameras belonging to either the Geological Survey or private contractors can be quickly and carefully tested with a minimum of lost time. The unique feature of this calibrator is that it permits stereoscopic measurements of the test plates, thereby refining the pro- cedure for evaluating camera performance. ! Investigations were also made into non-instrumental aspects of the photogrammetric syste such as further studies of the geometry of aerial photography, the effect of lens distortions, C-factor analyses, and other procedural studies. While important, they will not be discussed herein because they are not within the scope of this paper.

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