Proceedings of Symposium on Remote Sensing and Photo Interpretation: Proceedings of Symposium on Remote Sensing and Photo Interpretation

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Persistent identifier:: 842147969

Title:: Proceedings of Symposium on Remote Sensing and Photo Interpretation

Sub title:: October 7 - 11, 1974, Banff, Alberta, Canada

Type of content:: Konferenzschrift

Info on language/writing:: Beiträge überwiegend in englischer, teilweise in französischer und deutscher Sprache

Year of publication:: 1974

Place of publication:: Ottawa, Ontario

Publisher of the original:: Canadian Inst. of Surveying

Identifier (digital):: 842147969

Language:: German

Other Title:: Nebentitel: Proceedings : Symposium on Remote Sensing and Photo Interpretation

Document type:: Multivolume work

Volume

Persistent identifier:: 84214806X

Title:: Proceedings of Symposium on Remote Sensing and Photo Interpretation

Sub title:: October 7 - 11, 1974, Banff, Alberta, Canada

Scope:: VII, 465 Seiten

DOI:: 10.14463/GBV:84214806X

Year of publication:: 1974

Place of publication:: Ottawa, Ontario

Publisher of the original:: Canadian Inst. of Surveying

Identifier (digital):: 84214806X

Illustration:: Illustration, Diagramme, Karten

Signature of the source:: T 15 B 1305

Language:: German

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

Corporations:: International Society for Photogrammetry; Commission Interpretation of Data; Canadian Institute of Surveying

Author:: Symposium on Remote Sensing and Photo Interpretation, 1974; Banff, Alberta

Adapter:: International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Founder of work:: International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Other corporate:: International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2015

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: RESOURCE INVENTORIES CHAIRMAN. - H. VERSTAPPEN

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: MULTISPECTRAL REMOTE SENSING APPLICATION IN RANGELAND CAPABILITY EVALUATION FOR GRAZING. Mostafa K. Nosseir

Document type:: Multivolume work

Structure type:: Chapter

90 remote sensing analysis to evaluate rangeland in an area protected from grazing for two years. The area is located inside INPE's test site in Cachoeira Paulis- ta, 200 kilometers from Sao Paulo. The vegetation cover is one main palatable plant, known in Brazil as Capim Gordura ( Melinis minutiflora ) and very few mixed areas of Capim Coloniao ( Panicum maximum) . The two main invaders are Sapé ( Imperata brasiliensis ) and Vassourinha ( Baccharis rufescens) : Taboa ( Thyfa ap. ), an impalatable plant, indicates the presence of highly humid lowland soils, and a high water table. Some other species appear in some scattered plots because of the human use of this area before it was placed under pro tection. Napir elefente ( Pannisetum purpureum) Batatais ( Paspalum notatum) , Bambu and some bushes appear in the area also. During June-September, the dry season of Sao Paulo State, the palatable species such as( Melinis) are usually dry having lost their leaves after the flowering stage and the seed spreading stage. The invaders such as Sapé and Vassorinha stay fresh and strong extrac ting their needs from soil moisture but provide a less dense canopy cover. The dry season was choosen for the flight because of this contrast between palatable and nonpalatable plants. Laboratory spectrophotometer analysis was done to study the leaf reflectance along wavelength bands, using a Perkin-Elmer 450 model, with integrated sphere. In the growing stage of both ( Melinis) and ( Imperata) , the leaf reflectance curves (fig.l), show high chlorophyl absorption around 500 and 650 my wavelength. But ( Melinis) shows higher absorption than (Imperata). ( Imperata ), has the same reflectance curve pattern as ( Melinis) , but it is displaced about 10 my towards the shorter wavelength, in the all bands, comparing with ( Melinis ) curves —using this information an estimated leaf reflectance curve (fig. 2). It showed that there is high contrast between areas covered by ( Imperata ) and ( Melinis) in the spectral regions of: 500, 650 my and after 700 my. For this reason four filters have been chosen to be used with the selected films. (Table 1). The combination of filter transmissions and plant reflectance curves are also illustrated, (fig.2). The flight was on the 6th of July 1973, using a Hasselblad 500 EL/70mm system from an altitude of 1500 feet. Photos at a scale of 1:9144 were thus obtained. Four filters were used: yellow, orange, red and Kodak Wratten 89B. The primary purpose of the yellow filter is the correct rending of those color tones in the gray value. The orange filter is more a contrast filter and cover over corrects for the blue sky, so that, sky tones become darker than they appear to the eye and distant details appear stronger. The red filter goes further in over correction (4). Table-1, shows the flight parameters. The oper ation time was around 12:00 o'clock to avoid vegetation shade. Interpretation : The data was collected from four bands, each filter transmitting information about the ground cover. The summation of the data obtained from the four bands made accurate and efficient interpretation possi ble. The yellow filter transmits reflected radiation by the plant surfaces longer than .45y wave length. The red filter eliminates reflected radiation in wave length shorter than 0.575y. Thus the red filter gives information in a more contrasted format than the yellow by absorbing some information that appears with the other filters. This facilitates the interpretation by

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