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A semi-operational approach to land degradation mapping has been developed which requires radiometric rectification of the satellite data and the availability of spectral libraries. Linear spectral mixture modelling is used to decompose image spectra into their spectrally distinct components, the fractional abundance of which then provides a largely unbiased measure for direct mapping of vegetation abundance and the identification of soil degradation levels and erosion hazards. In this paper the need for such a method is described, with reference in particular to the limitations of traditional remote sensing techniques. The technique itself is then described with emphasis on the following: (i) detection of soil degradation and erosion hazards; (ii) the context of regional soil conditions; (iii) mapping soil development levels; (iv) portability; (v) change detection and monitoring capabilities.

Additional information

Authors: HILL J, JRC Ispra (IT)
Bibliographic Reference: Paper presented: International Symposium : Operationalisation of Remote Sensing, Enschede (NL), April 19-23, 1993
Availability: Available from (1) as Paper EN 37505 ORA
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