Actes du 7ième Congrès International de Photogrammétrie: Actes du 7ième Congrès International de Photogrammétrie

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Multivolume work

Persistent identifier:: 1048858235

Title:: Actes du 7ième Congrès International de Photogrammétrie

Sub title:: Washington, septembre 1952

Year of publication:: 1954

Place of publication:: Amsterdam

Publisher of the original:: Argus [u.a.]

Identifier (digital):: 1048858235

Language:: English

Other Title:: Paralleltitel: Proceedings of the 7th International Congress of Photogrammetry

Corporations:: International Congress of Photogrammetry, 7., 1952, Washington; American Society of Photogrammetry

Adapter:: International Congress of Photogrammetry, 7., 1952, Washington; American Society of Photogrammetry

Founder of work:: International Congress of Photogrammetry, 7., 1952, Washington; American Society of Photogrammetry

Other corporate:: International Congress of Photogrammetry, 7., 1952, Washington; American Society of Photogrammetry

Document type:: Multivolume work

Volume

Persistent identifier:: 104885955X

Title:: Actes du 7ième Congrès International de Photogrammétrie

Sub title:: Proceedings of the 7th International Congress of Photogrammetry

Scope:: circa 800 Seiten in verschiedenen Seitenzählungen

Year of publication:: 1954

Place of publication:: Amsterdam

Publisher of the original:: Argus u.a.

Identifier (digital):: 104885955X

Illustration:: Illustrationen

Signature of the source:: ZS 312(11,2)

Language:: French

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

Corporations:: International Congress of Photogrammetry, 7., 1952, Washington; American Society of Photogrammetry

Adapter:: International Congress of Photogrammetry, 7., 1952, Washington; American Society of Photogrammetry

Founder of work:: International Congress of Photogrammetry, 7., 1952, Washington; American Society of Photogrammetry

Other corporate:: International Congress of Photogrammetry, 7., 1952, Washington; American Society 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:: PROPOSED STANDARD TEST OF STEREOSCOPIC PLOTTING INSTRUMENTS by JOHN T. PENNINGTON, [...]

Document type:: Multivolume work

Structure type:: Chapter

PROPOSED STANDARD TEST OF STEREOSCOPIC PLOTTING INSTRUMENTS by Joun T. PENNINGTON, Alexandria, U.S.A. Precise calibration and adjustment of equipment used in each step of a photogrammetric mapping operation are required if the highest practicable order of accuracy is to be obtained, regardless of the type of equipment employed. The use of inferior or poorly adjusted equipment in one step of the process, can adver- sely affect results so that much, if not all, of the potential advantage gained by good equipment in proper adjustment in other steps of the process is lost. Often, resultant accuracies are not as good as they could be because through wear or reasons unknown, the plotting instrument is not in proper adjustment, and in- accurate conclusions are often drawn regarding the capabilities of a particular type of equipment because they are based on tests made with equipment in poor adjustment. In order to promote a better understanding of the capabilities and limitations of photogrammetric processes and equipment, it is considered highly desirable that 4 standard test for stereoscopic plotting instruments be developed. With such a test used universally, the performance of plotting instruments and the state of their repair and adjustment can be expressed in terms which can be universally understood. Such a test would also be valuable as a periodic check of the adjust- ment and calibration of plotting equipment and would provide a uniform basis for specifying the accuracy and precision of equipment for procurement purposes. To serve the purposes indicated, the test should be designed so that all the possible sources of error, not due to the instrument itself, that are inherent in the usual application of the instrument are eliminated. It should be simple and easy to apply so that it can be made by a trained instrument operator in not more than 4 few hours and should be applicable to all types of plotting instruments to pro- vide a basis for comparison between instruments. The test should be designed so that measurements are made in the same manner and under the same condition as they are made in operation with the plotting instrument, and should give the information desired in a convenient condensed form so that it can be readily evaluated. The requirement that the test be such that all possible sources of error not due to the instrument itself are eliminated, precludes the use of terrain photo- graphy, in which there are potential sources of error in the camera, photographic materials, photographic quality, ground control, etc. To meet this requirement the test must be made by making measurements of some form of a master grid plate, for which the dimensions are precisely known. In order that the measure- ments are made in the same manner as they are made in operation with the instru- ment, stereoscopic grid plates should be used and all measurements should be made stereoscopically. At the request of Captain O. 5. Reading, President of the International 1

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