Digital Soil Mapping in the Absence of Field Training Data: A Case Study Using Terrain Attributes and Semiautomated Soil Signature Derivation to Distinguish Ecological Potential

Figure 5

Soil line representing three mapped soil classes based on Landsat 7 ETM+ reflectance values corrected for atmospheric effects. Values are plotted for all pixels and support ancillary evidence to demonstrate that vegetation cover was very low and did not contribute substantially to the reflected spectral signal. See Table 4 for soil classification of field samples.