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:: 1048998053

Title:: Reprints of papers

Sub title:: VIIIe Congrès International de Photogrammétrie

Scope:: circa 1040 Seiten in verschiedenen Seitenzählungen

Year of publication:: 1957

Place of publication:: Stockholm

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 1048998053

Illustration:: Illustrationen

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

Language:: French

Other Title:: 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

Section

Title:: [Commission IV]

Write comment:: Nicht alle Vorträge enthalten

Document type:: Multivolume work

Structure type:: Section

Section

Title:: CHECKING METHODS FOR PHOTOGRAMMETRIC MAPS by Dr. Gian Piero LE DIVELEC [...]

Document type:: Multivolume work

Structure type:: Section

narrow zones to get the economic advantage of increasing to the maximum the flying height of the general taking, from which the map of the strip of land, on which the longilineous work will be projected, must be drawn. Normally these maps are drawn from 1/2.000 to 1/10.000 scale; an interval of contour lines of 2, sometimes also 5 meters, is required; altimetric precision generally will be equal to the half of the interval of the contour lines, exceptionally 1/4. Therefore we can make use of photographs taken from about 3.000 meters of relative height, being such value limited not so much by the altimetric precision, as by the possibility of enlargement of plotting apparatus of which we dispose. The increase of height and the use of apparatus having a great possibility of enlargement does not only represent an economical advantage, less important than what normally would happen {for the narrowness of the strip of land which must be really mapped, but constitutes a remarkable technical advantage of the employment of aerial survey. The increasing of the flying height and the interpretation of the photographs, eventually with the help of simple stereoscopes, give the planner of the work the possibility of adapting to the actual situation of the ground the choice of the strip on which he wants to make an accu- rate survey. By other means of surveys probably the execution of another map, less accurate but on wider extensions, would be needed; this map could certainly be done by photogrammetry, eventually employing the same photographs, but it is mostly substituted by the simple examination of the taken photographs. Interesting works of this kind have been executed here, in Italy, but as much as I know, the problems of co-ordination of the various cartographic stages for the study and the projects of roads (stereoscopic interpretation of the photographs, pre-map, map of detail) are particularly felt in the countries which do not dispose of an intermediate scale cartography, as for instance Brazil. In Brazil, the « Dep. do Estrada de Rodagem » of the State of S. Paulo has made some interesting successful experiments of complete application of the method. On account of the variety of maps for which the photogrammetry may be requested, the study of the agreement between economy and accuracy requires very changeable solutions. We have expressed only one point of view on some of them, not at all pretending to have given rules applicable to every case. or not. Generally it is convenient to treat separately the survey of these S( POUL

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