VIIIth International Congress of Photogrammetry: General reports

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

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:: 1048997715

Title:: General reports

Sub title:: VIIIe Congrès International de Photogrammétrie

Scope:: circa 330 Seiten in verschiedenen Seitenzählungen

Year of publication:: 1957

Place of publication:: Stockholm

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 1048997715

Illustration:: Illustrationen

Signature of the source:: ZS 312(12,3)

Language:: French

Other Title:: Paralleltitel: Rapports généraux

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:: REPORT OF COMMISSION VII PHOTOGRAPHIC INTERPRETATION to the INTERNATIONAL SOCIETY OF PHOTOGRAMMETRY STOCKHOLM, SWEDEN JULY, 1956

Document type:: Multivolume work

Structure type:: Chapter

Section

Title:: Quantitative Evaluation of Photo Interpretation Mapping HAROLD E. YOUNG and ERNEST G. STOECKELER

Document type:: Multivolume work

Structure type:: Section

Quantitative Evaluation of Photo Interpretation Mapping* HAROLD E. YOUNG 1 and ERNEST G. STOECKELER 2 Abstract: The accuracy of maps prepared by photo interpretation techniques has often been questioned by those who make the maps as well as by many users. In the past five years a number of American workers in the field of photo interpretation have emphasized the need for quantita tive evaluation of photo interpretation in Photogrammetric Engi neering. To illustrate the type of information required and the analytical procedures necessary to make a quantitative evaluation, an engineering soils map of a 210 square miles area (544 square kilometers) in the State of Maine was used as an illustration. Data were presented com paring photo interpretation classification versus actual field classifica tion of soils. By applying recognized statistical procedures, the authors prepared a table presenting photo interpretation errors based on field sampling at 19:1 odds. These data were further refined to show the error at 19:1 odds within soil types. In addition, a hypothetical illustration was presented to show the method of determining the accuracy of bound ary line location between adjacent soil types. In the authors' opinion, most mapping studies of the earth's surface and vegetation should be evaluated quantitatively so that the users can employ the map information more intelligently. With an accumulation of results of quantitative evaluation of a number of photo interpretation studies, it will be possible to compare photo interpretation accuracy resulting from such controllable factors as scale, season, film and filter as well as differences between photo interpreters. Introduction F orest type maps, engineering soils maps, maps of geologic studies, geo graphic studies and terrain analysis maps for military purposes of hundreds of thousands of square miles of territory have been prepared with the aid of photo interpretation techniques. It is inevitable that many people employing the maps will ask the question—how accurate is the photo interpretation? In most instances, it is not feasible to field check more than a small portion of the total area, and in some cases, it is not possible to do any field checking at all. Thus the concern over map reliability is very real. In the past five years Colwell (1), Lundahl (4), Sammi (8), Katz (2), Rogers (7), Pomerening and Cline (5) and Young (10) have emphatically expressed the need for quantitative evaluation of photogrammetry and photo interpretation. The papers and comments cited above should have aroused some interest among those who are doing photo interpretation of the earth’s surface and vegetation. Krumbein (3) and Potter and Siever (6) have recently employed * A Contribution of Commission VII, Photographic Interpretation, International Society of Photogrammetry. 1 Assistant Forester, Maine Agricultural Experiment Station. 2 Research Assistant, Soils Mechanics Laboratory, University of Maine.

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