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UNIVERSITY OF ALBERTA (1997)

Mapping of aeolian dune boundaries in southern Alberta using Landsat Thematic Mapper data for a wet and a dry period

Murphy, Laurel Lee

Titre : Mapping of aeolian dune boundaries in southern Alberta using Landsat Thematic Mapper data for a wet and a dry period

Auteur : Murphy, Laurel Lee

Université de soutenance : UNIVERSITY OF ALBERTA (Canada)

Grade : Master of Science 1997

Résumé
Multitemporal satellite data for a wet period and a dry period was used to map aeolian sand dune and interdune areas in the Duchess Dune Field, southern Alberta. Principal Component Analysis (PCA) revealed that the main temporal differences were represented in principal components 4, 5, and 6. A colour composite using these principal components effectively showed dune boundaries and dune form (parabolic). In addition to PCA, a multitemporal classification was performed ; a K-means cluster analysis (unsupervised training field sampling) showed that 15 clusters or groups best represented the data. After a discriminant analysis was performed and the results interpreted, 15 original classes were merged into 7. Of these 7 classes, two aeolian deposit classes resulted which were aeolian dune areas and interdune and sand sheet areas.

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