How was the NLCD 1992/2001 Retrofit Change Product created?

(Excerpt from FGDC Metadata) The change product database, stratified by NLCD 2001 mapping zones, is a system of processing modules that contain the modeling components, input variables, and output results from the change detection processing sequence. To create intermediate and final product thematic layers, decision tree classification modeling is used. The specific decision tree program employed is called See5, which implements a gain ratio criterion in tree development and pruning (Quinlan, 1993).

See5 also implemented several advanced features that can aid and improve land cover classification, including boosting and cross-validation. Boosting is a technique for improving classification accuracy, while cross-validation can provide a certain level of estimation regarding the land cover classification quality. In addition, See5 can generate a confidence estimate for each classified pixel and record the associated classification logic in a text file.

In the first processing module, ... more.

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