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:: APPLICATION OF PHOTOGRAMMETRY IN ROAD LOCATION IN TROPICAL AREAS by B. Scherpbier. [...]

Document type:: Multivolume work

Structure type:: Chapter

APPLICATION OF PHOTOGRAMMETRY IN ROAD LOCATION IN TROPICAL AREAS by B. Scherpbier. N.V. De Bataafsche Petroleum Maatschappij. Royal Dutch/Shell Group. Introduction. In locating highways in tropical regions which have already been developed to such an extent that large-scale topographical maps and an accurate geodetic base are available, photogrammetry can be applied in the same way as in Europe or the U.S.A., namely, by preparing maps to a scale of 1:2500, or even 1 : 1000, from aerial photographs, for which purpose a narrow strip is specially photo- graphed between the points to be connected by the road. With the help of the maps it is possible to make reliable quantity estimates. Use of aerial photographs in conjunction with maps affords a very good idea of the territory, with everything on it, so that all such natural and artificial features can be taken into account in planning the location of the road. There are, however, many tropical regions of which no large-scale maps exist, and regarding which the only detailed information available is in the form of sketch maps containing few data concerning elevation and natural drainage. In these areas, which are usually covered with dense jungle, photogrammetry can still be used with great success for the purpose of obtaining contour maps on which a preliminary road project can be made and which can also serve as a basis for an estimate of quantities of ground to be moved, dimensions of bridges and culverts, etc. Terrestrial Plotting. If a road has to be located in areas of which no aerial photographs are available, the only course open is to try to plot, on the available sketch maps, the connection between the beginning and the end of the proposed road via the governing points. In order to obtain a reliable project, a reconnaissance survey has to be carried out and a broad strip of the terrain must be studied. In the course of this recon- naissance a large amount of ground-surveying must, of course, be done, and, if time permits, it is even desirable to prepare a complete contour map of a strip between the starting and finishing points, via the governing points, with a width of between a quarter and a third of the length of the strip. Since, as a rule, no basic geodetic information is available regarding such areas, it goes without saying that this method of working involves considerable expenditure and time. Another mode of procedure is to make a preliminary reconnaissance survey throughout an area approximately as broad as that mentioned above, relying on field knowledge and planning sense, to obtain some alternative locations, which are later mapped in detail over a width of about 1 km. If the first method is applied one can be comparatively certain of ultimately finding the right location for the road. When the second method is applied there 1

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