Scientia Agricola | |
Digital soilscape mapping of tropical hillslope areas by neural networks | |
Waldir De Carvalhojunior2  César Da Silva Chagas2  Elpídio Inácio Fernandesfilho1  Carlos Antonio Oliveira Vieira1  Carlos Ernesto Gonçalves Schaefer1  Silvio Barge Bhering2  Marcio Rocha Francelino1  | |
[1] ,Embrapa SolosRio de Janeiro RJ ,Brasil | |
关键词: geomorphometric attribute; digital soil mapping; digital elevation model; | |
DOI : 10.1590/S0103-90162011000600014 | |
来源: SciELO | |
【 摘 要 】
Geomorphometric variables are applied in digital soil mapping because of their strong correlation with the disposition and distribution of pedological components of the landscapes. In this research, the relationship between environmental components of tropical hillslope areas in the Rio de Janeiro State, Brazil, artificial neural networks (ANN), and maximum likelihood algorithm (MaxLike) were evaluated with the aid of geoprocessing techniques. ANN and MaxLike were applied to soilscape mapping and the results were compared to the original map. The ANN architectures with seven and five neurons in the hidden layer produced the best classifications when using samples obtained systematically. When random samples were applied, the best neural net architectures were within 22 and 16 neurons in the hidden layer. In conclusion, the ANN can contribute to soilscape surveys, making map delineation faster and less expensive. The digital elevation model (DEM) and its derived attributes can contribute to the understanding of the soil-landscape relationship of tropical hillslope areas; the use of artificial neural networks and MaxLike is feasible for digital soilscape mapping. The systematic sampling method provided a global accuracy of 70 % and 65.9 % for the ANN and the MaxLike, respectively. When the random sampling method was applied, the ANN had a global accuracy of 69.6 %, and the MaxLike had an accuracy of 62.1 %, considering the total study area in relation to the reference map.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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RO202005130118620ZK.pdf | 1197KB | download |