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SP-399 SKYLAB EREP Investigations Summary

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FIGURE 3-12.-A comparison of two classification systems, "ECHO" and "per-point," using forested terrain as a test site. The per-point classification gives a salt-and-pepper effect, whereas the ECHO gives a classification similar to that achieved by standard photointerpretative techniques. The various cover types are designated by the following color codes: white, snow; light red, deciduous forest; dark red, grasslands; black, water and cloud shadows; and blue, coniferous forest. (a) Per-point classification. (b) ECHO classification.

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