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Part 1: Document Description
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Citation |
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Title: |
Training Field Soil Data for Mapping of Soil Particle Size Distribution (0–30 cm) in Brazil (MapBiomas Soil Collection 2, Beta Version) |
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Identification Number: |
doi:10.60502/SoilData/P6R332 |
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Distributor: |
SoilData |
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Date of Distribution: |
2024-12-14 |
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Version: |
1 |
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Bibliographic Citation: |
MapBiomas, 2024, "Training Field Soil Data for Mapping of Soil Particle Size Distribution (0–30 cm) in Brazil (MapBiomas Soil Collection 2, Beta Version)", https://doi.org/10.60502/SoilData/P6R332, SoilData, V1, UNF:6:UIo9Du9z2FFtSMZZ1X19TA== [fileUNF] |
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Citation |
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Title: |
Training Field Soil Data for Mapping of Soil Particle Size Distribution (0–30 cm) in Brazil (MapBiomas Soil Collection 2, Beta Version) |
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Identification Number: |
doi:10.60502/SoilData/P6R332 |
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Authoring Entity: |
MapBiomas (MapBiomas) |
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Other identifications and acknowledgements: |
Ferreira, Laerte |
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Other identifications and acknowledgements: |
Samuel-Rosa, Alessandro |
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Other identifications and acknowledgements: |
Horst, Taciara Zborowski |
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Other identifications and acknowledgements: |
Shimbo, Julia |
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Other identifications and acknowledgements: |
Rosa, Marcos |
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Other identifications and acknowledgements: |
Anjos, Marcos Alexandre dos |
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Other identifications and acknowledgements: |
Huf dos Reis, Aline Mari |
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Other identifications and acknowledgements: |
Kerber, Débora Liriel |
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Other identifications and acknowledgements: |
Peruzzi, Vitor |
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Other identifications and acknowledgements: |
Serena, Gabriele Vitória Silva |
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Other identifications and acknowledgements: |
Pretto, Ana Caroline |
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Other identifications and acknowledgements: |
Pontes, David Oliveira |
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Other identifications and acknowledgements: |
Silva, Luciana da Luz |
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Other identifications and acknowledgements: |
Cardoso, Marcos Vinícius Souza |
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Other identifications and acknowledgements: |
Cardoso, Maria Eduarda Ferreira |
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Other identifications and acknowledgements: |
Alencastro, Mary Evelyn Santos |
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Other identifications and acknowledgements: |
Sobucki, Lisiane |
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Other identifications and acknowledgements: |
Parizzi, Talita |
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Other identifications and acknowledgements: |
Capoane, Viviane |
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Other identifications and acknowledgements: |
Souza, Deórgia |
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Other identifications and acknowledgements: |
Tornquist, Carlos Gustavo |
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Other identifications and acknowledgements: |
Rocha, Anderson Sandro da |
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Other identifications and acknowledgements: |
Oliveira, Sergio |
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Other identifications and acknowledgements: |
Munsberg, Glauco |
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Other identifications and acknowledgements: |
Azevedo, Tasso |
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Distributor: |
SoilData |
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Access Authority: |
MapBiomas |
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Depositor: |
Samuel-Rosa, Alessandro |
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Date of Deposit: |
2024-12-06 |
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Date of Distribution: |
2024-12-06 |
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Holdings Information: |
https://doi.org/10.60502/SoilData/P6R332 |
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Study Scope |
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Keywords: |
Ciências Agrárias, Ciências da Terra e do meio ambiente, Particle size distribution, Topsoil, Brazilian biomes |
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Abstract: |
Collection of 11,633 georeferenced points with data from 19,965 soil layers used to train regression models for mapping soil particle size distribution (0–30 cm) in Brazil. These data supported the development of clay, silt, and sand content maps in Collection 2 of the MapBiomas Soil project (beta version). Each record includes spatial coordinates, the midpoint depth of the soil layer, and additive log-ratios—log(clay/sand) and log(silt/sand)—for the 0–30 cm soil layer. |
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<b>Detailed description</b>: Soil data were collected from 262 studies published in the Brazilian soil data repository SoilData (<a href=\"https://soildata.mapbiomas.org\">https://soildata.mapbiomas.org</a>). After analysis, a total of 182 studies was selected for the spatial modeling of soil particle size distribution (clay, silt, and sand). These studies represent 11,633 points distributed across Brazil, totaling 19,965 soil layers up to 40 cm in depth. For each layer, the percentage proportions of clay, silt, and sand were transformed into additive log-ratios—log(clay/sand) and log(silt/sand)—a mathematical representation that enhances the stability of the modeling process.<br/><br/>The dataset includes the following columns:<ul><li><b>point_id:</b> An alphanumeric code that identifies the source dataset ("ctb" followed by four numbers, such as ctb0003) and the ID of the soil profile, observation, or sampling point (event) in that dataset.</li><li><b>latitude and longitude:</b> Decimal geographic coordinates in the WGS84 coordinate reference system (EPSG:4326).</li><li><b>depth:</b> The midpoint depth of the soil layer sampled in the field.</li><li><b>log_clay_sand and log_silt_sand:</b> Additive log-ratios for clay-to-sand and silt-to-sand fractions, respectively.</li></ul><br/>The code used to process the data is available at <a href=\"https://github.com/Laboratorio-de-Pedometria/mapbiomas-soc\">https://github.com/Laboratorio-de-Pedometria/mapbiomas-soc</a>. |
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Time Period: |
1958-2023 |
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Date of Collection: |
1958-2023 |
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Country: |
Brazil |
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Geographic Unit(s): |
Country |
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Kind of Data: |
survey data |
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Kind of Data: |
geo-referenced data |
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Kind of Data: |
raw data |
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Kind of Data: |
compiled data |
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Methodology and Processing |
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Sources Statement |
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Data Access |
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Other Study Description Materials |
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File Description--f732 |
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File: soil-particle-size-distribution-0-30-cm-percentage.tab |
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Notes: |
UNF:6:UIo9Du9z2FFtSMZZ1X19TA== |
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List of Variables: |
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Variables |
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f732 Location: |
Variable Format: character Notes: UNF:6:pFZTlhBpF8SpGKeo5as4DQ== |
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f732 Location: |
Summary Statistics: Mean -54.083773491223766; Min. -73.78333; Max. -34.8833; Valid 19965.0; StDev 8.568978477543407 Variable Format: numeric Notes: UNF:6:AoIP1mkYpk5iNGpv+2Nu0w== |
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f732 Location: |
Summary Statistics: Valid 19965.0; Mean -15.38173040448577; StDev 8.841112450419763; Min. -33.55901; Max. 4.633333 Variable Format: numeric Notes: UNF:6:yf+lvll1yX+TjDzb2J9nkA== |
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f732 Location: |
Summary Statistics: StDev 11.592402261462146; Valid 19965.0; Max. 40.0; Mean 17.46944653143; Min. 0.5; Variable Format: numeric Notes: UNF:6:xGTG+VSlck4iUWj1mwVuag== |
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f732 Location: |
Summary Statistics: StDev 1.539498045879412; Mean -0.27284950135954367; Min. -4.58496747867057; Max. 4.58496747867057; Valid 19965.0 Variable Format: numeric Notes: UNF:6:j/xeRBzABHJMsIQ0rsDgFQ== |
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f732 Location: |
Summary Statistics: Max. 4.4188406077966; StDev 1.510581236001069; Min. -4.58496747867057; Valid 19965.0; Mean -0.787530142494275 Variable Format: numeric Notes: UNF:6:df164bcJfF/DtBvOu3rYMg== |