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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Pedological mapping through integration of digital terrain models spectral sensing and photopedology

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Dematte, Jose A. M. [1] ; Rizzo, Rodnei [2] ; Botteon, Victor Wilson [1]
Total Authors: 3
[1] Univ Sao Paulo, ESALQ, LSO, Dept Ciencia Solo, Piracicaba, SP - Brazil
[2] CENA, Ctr Energia Nucl Agr, Piracicaba, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Revista Ciência Agronômica; v. 46, n. 4, p. 669-678, OCT-DEC 2015.
Web of Science Citations: 3

New tools for soil mapping are needed to increase speed and accuracy of pedological mapping processes. This study integrated various technologies to map soils of the Piracicaba region in Sao Paulo State, Brazil. Each technology was expected to provide different information to design a detailed map. We carried out field survey and soil sampling for laboratory analysis. Initially, we conducted field visits to obtain soil patterns of a reference site. We applied the acquired patterns to an validation site, based solely on information obtained from remote sensing and cartographic databases, namely LANDSAT 7/ETM, digital elevation models (DEM) and aerial photographs. We integrated the information from each product to generate the map of the validation site, which was validated by field inspection. Textural classification using satellite imaging ranged from 21-51% of accuracy. Band 5 in the sensor showed the best performance to discriminate between clayey and sandy soils. Aerial photographs provided the best information because, besides their own inherent characteristics, they operate on a larger scale and result in a map with up to 50 polygons, while DEM reached a maximum of 30 polygons. The digital mapping technology generated 45 mapping units. Finally, the mapping efficiently separated the Latosols from the other classes; however, in some cases there was confusion in the identification of Cambisols and litholic Neosols. (AU)