essential
likely
maybe
probably not
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Rouse et al. (1974) NDVI — what data was it developed on?
Plain English (default view) — short, conversational, lightly seasoned with science
🔬 Scientific / formula (revealed on click) — markdown + $$…$$ ok
**AVHRR** imagery of the **US Great Plains**. The normalized-difference form kept values bounded (unlike SR) and reduced illumination variability — became the canonical VI.
💡 Mnemonic / memory aid (shown on hover)
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