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Bugnicourt P., Guitet S., Santos V. F., Blanc L., Sotta E. D., Barbier Nicolas, Couteron Pierre. (2018). Using textural analysis for regional landform and landscape mapping, Eastern Guiana Shield. Geomorphology, 317, 23-44. ISSN 0169-555X

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Lien direct chez l'éditeur doi:10.1016/j.geomorph.2018.03.017

Titre
Using textural analysis for regional landform and landscape mapping, Eastern Guiana Shield
Année de publication2018
Type de documentArticle référencé dans le Web of Science WOS:000440120600003
AuteursBugnicourt P., Guitet S., Santos V. F., Blanc L., Sotta E. D., Barbier Nicolas, Couteron Pierre.
SourceGeomorphology, 2018, 317, p. 23-44. ISSN 0169-555X
RésuméAvailability of digital elevation models (DEM) of increased spatial resolution has triggered interest in texture based methods for automated geomorphometry. This prospect is all the more appealing concerning tropical countries for which mapping of geomorphic entities has remained limited despite its relevance for natural resource assessment and land planning. In this paper we applied to the Shuttle Radar Topography Mission (SRTM) DEM a multiscale texture analysis based on Fourier 2D periodogram (FOTO method) to reach a spatially coherent mapping that would agree with current knowledge over the conterminous territories of French Guiana and Amapa (Brazil). Through a principal component analysis, FOTO-extracted textural features were found complementary and combined with six common physiographic criteria (convexity, wetness index, dissection, elevation, and percent of steep and low slopes) calculated from the DEM. This provided a primary semiautomated mapping of 16 classes of landform types. To increase legibility, we a aggregated into eight landscape unit classes that were the most similar in terms of texture and relief criteria while being frequently contiguous. The resulting map was compared with existing maps that were, however, more local or of lesser resolution and informative content over the region of interest. Multiscale Fourier spectra proved useful to depict land surface texture and, in synergy with relief variables, allowed identifying a large variety of landforms for broad-scale geomorphic mapping in the humid tropics.
Plan de classementEtudes, transformation, conservation du milieu naturel [082] ; Télédétection [126]
Descr. géo.GUYANE FRANCAISE. BRESIL ; AMAPA
LocalisationFonds IRD [F B010073690]
Identifiant IRDfdi:010073690
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010073690

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