The agricultural regions of England appear in LANDSAT IMAGES as extended mosaic patterns of small fields. Individual fields, especially in the hillier north and west of the country may be as small as a few pixels and thus it is the field patterns themselves which make up the texture of the image. We have been concerned with the problem of mapping the average orientation of fields (a secondary indicator for geomorphology) and the distribution of field size.
Two approaches are being used:
(i) Holographic derivation of local autocorrelation information.
(ii) Digital extraction of statistical parameters.
For our test area in East Cornwall we have compared optically and digitally derived autocorrelation functions. We have also studied the local stationarity of the first and second order statistical measures which is crucial when evaluating statistical classification strategies.
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