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

Table 3

Transformed Divergence (TD) values for iterative assessment of spectral signatures to distinguish soil classes over a 150 ha study area on the Chihuahuan Desert Rangeland Research Center in southern New Mexico. Minimum (Min) and mean TD values were tabulated within the Signature Editor in ERDAS Imagine software (v.9.3, ERDAS, Inc., Norcross, Ga, USA).

No. clusters	Pairs per combination	Min TD value	Average TD value
10	45	1,511	1,887
9	36	1,365	1,882
8	28	1,595	1,882
7	21	1,614	1,870
6	15	1,481	1,867
5	10	1,658	1,859
4	6	1,715	1,856
3	3	1,940	1,957