Actes du Symposium International de la Commission VII de la Société Internationale de Photogrammétrie et Télédétection: Actes du Symposium International de la Commission VII de la Société Internationale de Photogrammétrie et Télédétection

Laidet, L.

Actes du Symposium International de la Commission VII de la Société Internationale de Photogrammétrie et Télédétection (Volume 2)

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Multivolume work

Persistent identifier:: 1669258823

Title:: Actes du Symposium International de la Commission VII de la Société Internationale de Photogrammétrie et Télédétection

Sub title:: Toulouse, 13 - 17 Septembre 1982

Year of publication:: 1982

Place of publication:: Toulouse

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 1669258823

Language:: English

Editor:: Laidet, L.

Corporations:: International Society for Photogrammetry and Remote Sensing, Commission VII, Interpretation of Data

Adapter:: International Society for Photogrammetry and Remote Sensing, Commission VII, Interpretation of Data

Founder of work:: International Society for Photogrammetry and Remote Sensing, Commission VII, Interpretation of Data

Other corporate:: International Society for Photogrammetry and Remote Sensing, Commission VII, Interpretation of Data

Document type:: Multivolume work

Volume

Persistent identifier:: 1669259897

Title:: Actes du Symposium International de la Commission VII de la Société Internationale de Photogrammétrie et Télédétection

Scope:: XV, 415 Seiten

Year of publication:: 1982

Place of publication:: Toulouse

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 1669259897

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(24,7,2)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist ermittelt.

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

Editor:: Laidet, L.

Corporations:: International Society for Photogrammetry and Remote Sensing,, Commission VII, Interpretation of Data

Adapter:: International Society for Photogrammetry and Remote Sensing,, Commission VII, Interpretation of Data

Founder of work:: International Society for Photogrammetry and Remote Sensing,, Commission VII, Interpretation of Data

Other corporate:: International Society for Photogrammetry and Remote Sensing,, Commission VII, Interpretation of Data

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:: WG VII-5 RESSOURCES NON RENOUVELABLES. - NON RENEWABLE RESOURCES.

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: [SESSION 7]

Document type:: Multivolume work

Structure type:: Chapter

ES d GEOBOTANICAL TECHNIQUES FOR DISCRIMINATING SERPENTINE ROCK TYPES IN WESTERN UNITED STATES by D. Mouat NASA Ames Research Center Moffett Field, California, U.S.A. and C. Elvidge and R. Lyon Stanford University Stanford, California, U.S.A. ABSTRACT Serpentine-derived soils have a significant affect on species comp- osition, vegetation density, and vegetational spectral response as a result of several factors including low calcium/magnesium ratios and high concentrations of chromium, cobalt, and nickel. Remote sensing techniques involving airborne scanner imagery and several statistical and image processing techniques were used in three diverse test sites in western United States to discriminate vegetation parameters associated with serpentine rock types. Vegetation parameters which were found to be most useful for discriminating the serpentine rock types included species composition changes and density. In general, more xeric vegetation types occur within the areas of serpentine. In regions of mixed woodland and forest, serpentine soils tend to be characterized by coniferous tree species while in semiarid terrain, serpentine soils are characterized more by shrubby than by grassy species. These broad vegetation differences and more specific vegetation types were readily discriminated by the remote sensing analysis. Useful techniques involved relatively simple visual image analysis, contrast stretching of individual bands, stepwise discriminant analysis, and principal components analysis. INTRODUCTION Vegetation on serpentine soils is commonly sparser and of different composition than the vegetation occurring on neighboring non-serpentine soils. This phenomenon has been reported from various locations around the world, in- cluding New Zealand, Poland, the Soviet Union, and the United States (Whittaker, 1954; Brooks, 1972). The identification of serpentine and the host ultramafic rock pes is of considerable interest as they Commoniy contain economic deposits of metals such as Cr, Ni, and Co. There are several distinctive properties of serpentine soils that are adverse to the growth and development of many plant species. Serpentine soils are usually low in Ca and high in Mg. Both of these elements are 4155

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