Computers in Geological Photointerpretation
Computer processing of digital remote-sensing data can produce imagery of high spectral and geometric fidelity without the degradation associated with photographic reproduction. This is a significant advance in quality control in the data-acquisition system.
However progress in the interpretation system lags considerably. In one specific application, interpretation for geological lineaments, there occur low correlations between annotations which have hindered the acceptance of geological photointerpretations as reliable data.
Recently, perception models have been developed which radically alter our understanding of the properties of annotations. In particular the models imply that presence-absence data associated with the existence of lineaments is not a ranked binary variable and correlation measures are meaningless as indicators of data quality.
Computer processing now seems to be essential in geological photointerpretation. The procedures developed to date comprise estimation of operator resolution, digitization of annotations to arrays of cells, fitting perception models, and using the model parameters to assign probability estimates to quality maps written as shade prints or on filmwriters.
KeywordsLANDSAT Imagery Perception Model Positive Message Negative Message Decision Area
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