Computer-assisted cartography using topographic properties: precision and accuracy of local soil maps in central Mexico
| Autor: | Gustavo Cruz-Cárdenas, Carlos Alberto Ortiz-Solorio, Enrique Ojeda-Trejo, Juan Felipe Martínez-Montoya, Erasto Domingo Sotelo-Ruiz, Atenogenes Leobardo Licona-Vargas |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Revista Brasileira de Ciência do Solo, Vol 35, Iss 3, Pp 683-691 (2011) |
| Druh dokumentu: | article |
| ISSN: | 1806-9657 0100-0683 |
| DOI: | 10.1590/S0100-06832011000300003 |
| Popis: | Map units directly related to properties of soil-landscape are generated by local soil classes. Therefore to take into consideration the knowledge of farmers is essential to automate the procedure. The aim of this study was to map local soil classes by computer-assisted cartography (CAC), using several combinations of topographic properties produced by GIS (digital elevation model, aspect, slope, and profile curvature). A decision tree was used to find the number of topographic properties required for digital cartography of the local soil classes. The maps produced were evaluated based on the attributes of map quality defined as precision and accuracy of the CAC-based maps. The evaluation was carried out in Central Mexico using three maps of local soil classes with contrasting landscape and climatic conditions (desert, temperate, and tropical). In the three areas the precision (56 %) of the CAC maps based on elevation as topographical feature was higher than when based on slope, aspect and profile curvature. The accuracy of the maps (boundary locations) was however low (33 %), in other words, further research is required to improve this indicator. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|