Remote sensing for resources development and environmental management: Remote sensing for resources development and environmental management

Damen, M. C. J.

Bibliographic data

Multivolume work

Persistent identifier:: 856342815

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856342815

Language:: English

Additional Notes:: Volume 1-3 erschienen von 1986-1988

Editor:: Damen, M. C. J.

Document type:: Multivolume work

Volume

Persistent identifier:: 856343064

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Scope:: XV, 547 Seiten

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856343064

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(26,7,1)

Language:: English

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

Editor:: Damen, M. C. J.

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: 1 Visible and infrared data. Chairman: F. Quiel, Liaison: N J. Mulder

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Airphoto map control with Landsat - An alternative to the slotted templet method. W. D. Langeraar

Document type:: Multivolume work

Structure type:: Chapter

50 Symp would of course need a much denser field of control Trorey, L.G. 1947. points than 1 per 85 photos. In fact, each Slotted templet error. individual aerial photograph would need control. Photogrammetric Engineering, vol. 13, no 2, This independent control per photo is provided by p. 227-229 the Landsat map control method in a more elegant way. New by us 5.2 Evaluation The Landsat control method seems ideally suited to mapping situations in remote areas where only unreliable maps exist, and with aerial photographs which have been flown with tilts and altitude variation beyond normal margins. Usually, these three conditions are encountered simultaneously. In remote regions of the Amazon basin, for instance, reliable maps are hard to find and aerial photography coverage by local air survey companies is not exactly awe inspiring as far as quality is concerned. In such conditions it is going to be nearly impossible to employ the slotted templet method. In a mapping situation with ample ground control the slotted templet method would, as far as accuracy is concerned, win from the Landsat airphoto map control method. However, this situation is hypothetical because ample ground control implies that the mapping exercise must be taking place in the developed world where sophisticated aerotriangulation techniques have taken over. Therefore, the method of airphoto mapping using slotted templets has survived up to the present only in remote areas. Even here, the slotted temple method will have to give way to another approach. This could be with Landsat controlled airphoto mapping, because it has a number of advantages over the slotted templet method, especially with airphotos that were flown at varying altitudes and with tilt. These advantages are the following: * photo tilt and scale variations do not influence accuracy of the map; * no ground control is required prior to flying; * Landsat control is always densely and evenly distributed over the map which implies that acceptable accuracy also is evenly distributed; * map compilation is done very swiftly even under field conditions. We can therefore conclude that the slotted templet method has become obsolete, not only in the industrialized world but also in mapping situations at the 'last frontiers'. Especially in the latter regions the airphoto map control method using Landsat is the preferred alternative as it is the most cost-effective mapping routine for the production of basemaps with an mean accuracy requirement of 30 m, and as it can always be used in conjunction with topographical traversing work to correliate field data with airphotos and to update basemap accuracy. REFERENCES Dovey, S. 1983. Improved framing accuracy with Landsat-4, ALS Newsletter, vol 3, no. 1, p. 5-6. Dovey, S. 1986. Personal communication. Slama, C.C., H. Ebner and L. Fritz. 1980. Aerotriangulation, in: Manual of photogrammetry (ed. C.C. Slama), p. 453-456. C.C.Lir Center fo ABSTRACT interact A contoi pixel in thinning peaks, associat: pixel w: neighbor; shortest intersecl the effe easily ac values wi etc. Sf results v 1. Introd Topogra obtained photograp of manpo However, are prep most par efficient Satelli extractin 1984). forestry necessary (Ragan 19 an indis; informatii 1983; Fail Interpo' DEM (Temj al,1984). the giv< elevation interpolal approach £ Recentl] camera, \ of such S3 raster foi a recent £ such a i steepest c adaptable reasonable This proc elevation terrains, the. eleva may not b such types a mountain

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