Integrating geospatial and multi-depth laboratory spectral data for mapping soil classes in a geologically complex area in southeastern Brazil
Soil mapping across large areas can be enhanced by integrating different methods and data sources. This study merges laboratory, field and remote sensing data to create digital maps of soil suborders based on the Brazilian Soil Classification System, with and without additional textural classificati...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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Blackwell Publishing Ltd
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/73760 |
| _version_ | 1848763090678579200 |
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| author | Vasques, G. Demattê, J. Viscarra Rossel, Raphael Ramírez López, L. Terra, F. Rizzo, R. De Souza Filho, C. |
| author_facet | Vasques, G. Demattê, J. Viscarra Rossel, Raphael Ramírez López, L. Terra, F. Rizzo, R. De Souza Filho, C. |
| author_sort | Vasques, G. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Soil mapping across large areas can be enhanced by integrating different methods and data sources. This study merges laboratory, field and remote sensing data to create digital maps of soil suborders based on the Brazilian Soil Classification System, with and without additional textural classification, in an area of 13000ha in the state of São Paulo, southeastern Brazil. Data from 289 visited soil profiles were used in multinomial logistic regression to predict soil suborders from geospatial data (geology, topography, emissivity and vegetation index) and visible-near infrared (400-2500nm) reflectance of soil samples collected at three depths (0-20, 40-60 and 80-100cm). The derived maps were validated with 47 external observations, and compared with two conventional soil maps at scales of 1:100000 and 1:20000. Soil suborders with and without textural classification were predicted correctly for 44 and 52% of the soil profiles, respectively. The derived suborder maps agreed with the 1:100000 and 1:20000 conventional maps in 20 and 23% (with textural classification) and 41 and 46% (without textural classification) of the area, respectively. Soils that were well defined along relief gradients (Latosols and Argisols) were predicted with up to 91% agreement, whereas soils in complex areas (Cambisols and Neosols) were poorly predicted. Adding textural classification to suborders considerably degraded classification accuracy; thus modelling at the suborder level alone is recommended. Stream density and laboratory soil reflectance improved all classification models, showing their potential to aid digital soil mapping in complex tropical environments. |
| first_indexed | 2025-11-14T10:57:56Z |
| format | Journal Article |
| id | curtin-20.500.11937-73760 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:57:56Z |
| publishDate | 2015 |
| publisher | Blackwell Publishing Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-737602019-08-15T05:29:03Z Integrating geospatial and multi-depth laboratory spectral data for mapping soil classes in a geologically complex area in southeastern Brazil Vasques, G. Demattê, J. Viscarra Rossel, Raphael Ramírez López, L. Terra, F. Rizzo, R. De Souza Filho, C. Soil mapping across large areas can be enhanced by integrating different methods and data sources. This study merges laboratory, field and remote sensing data to create digital maps of soil suborders based on the Brazilian Soil Classification System, with and without additional textural classification, in an area of 13000ha in the state of São Paulo, southeastern Brazil. Data from 289 visited soil profiles were used in multinomial logistic regression to predict soil suborders from geospatial data (geology, topography, emissivity and vegetation index) and visible-near infrared (400-2500nm) reflectance of soil samples collected at three depths (0-20, 40-60 and 80-100cm). The derived maps were validated with 47 external observations, and compared with two conventional soil maps at scales of 1:100000 and 1:20000. Soil suborders with and without textural classification were predicted correctly for 44 and 52% of the soil profiles, respectively. The derived suborder maps agreed with the 1:100000 and 1:20000 conventional maps in 20 and 23% (with textural classification) and 41 and 46% (without textural classification) of the area, respectively. Soils that were well defined along relief gradients (Latosols and Argisols) were predicted with up to 91% agreement, whereas soils in complex areas (Cambisols and Neosols) were poorly predicted. Adding textural classification to suborders considerably degraded classification accuracy; thus modelling at the suborder level alone is recommended. Stream density and laboratory soil reflectance improved all classification models, showing their potential to aid digital soil mapping in complex tropical environments. 2015 Journal Article http://hdl.handle.net/20.500.11937/73760 10.1111/ejss.12255 Blackwell Publishing Ltd restricted |
| spellingShingle | Vasques, G. Demattê, J. Viscarra Rossel, Raphael Ramírez López, L. Terra, F. Rizzo, R. De Souza Filho, C. Integrating geospatial and multi-depth laboratory spectral data for mapping soil classes in a geologically complex area in southeastern Brazil |
| title | Integrating geospatial and multi-depth laboratory spectral data for mapping soil classes in a geologically complex area in southeastern Brazil |
| title_full | Integrating geospatial and multi-depth laboratory spectral data for mapping soil classes in a geologically complex area in southeastern Brazil |
| title_fullStr | Integrating geospatial and multi-depth laboratory spectral data for mapping soil classes in a geologically complex area in southeastern Brazil |
| title_full_unstemmed | Integrating geospatial and multi-depth laboratory spectral data for mapping soil classes in a geologically complex area in southeastern Brazil |
| title_short | Integrating geospatial and multi-depth laboratory spectral data for mapping soil classes in a geologically complex area in southeastern Brazil |
| title_sort | integrating geospatial and multi-depth laboratory spectral data for mapping soil classes in a geologically complex area in southeastern brazil |
| url | http://hdl.handle.net/20.500.11937/73760 |