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Full-Text Articles in Physical Sciences and Mathematics
The Historical Role Of Base Maps In Soil Geography, Bradley A. Miller, R. J. Schaetzl
The Historical Role Of Base Maps In Soil Geography, Bradley A. Miller, R. J. Schaetzl
Bradley A Miller
Soil mapping is a major goal of soil science. Soil maps rely upon accurate base maps, both for positional reference and to provide environmental data that can assist in the prediction of soil properties. This paper reviews the historical development of base maps used for soil mapping, and evaluates the dependence of soil mapping on base maps. The availability of geographic technology for producing base maps has both constrained and directed the geographic study of soil. The lack of accurate methods for determining location limited early geographic descriptions of soils to narratives, or to listings of attributes for property-based map …
Semantic Calibration Of Digital Terrain Analysis Scale, Bradley A. Miller
Semantic Calibration Of Digital Terrain Analysis Scale, Bradley A. Miller
Bradley A Miller
Digital terrain analysis (DTA) provides efficient, repeatable, and quantified metrics of landscape characteristics that are important to the Earth sciences, particularly for detailed soil mapping applications. However, DTA has not been field tested to the extent that traditional field metrics of topography have been. Human assessment of topography synthesizes multiple parameters at multiple scales to characterize a landscape, based on field experience. In order to capture the analysis scale used by field scientists, this study introduces a method for calibrating the analysis scale of DTA to field assessments. This method is used to calibrate land-surface derivatives of relative elevation, profile …