essential
likely
maybe
probably not
Front (prompt)
EVI — formula and coefficients?
Plain English (default view) — short, conversational, lightly seasoned with science
Think of EVI as NDVI's smarter cousin. It does two extra tricks: - Uses the **blue band** to subtract atmospheric haze that fools NDVI on smoggy days. - Adds a soil-adjustment factor so dry dirt doesn't artificially inflate the score. Use EVI when NDVI **flatlines** — i.e., over thick rainforest canopy where every leaf already maxes NDVI out. EVI keeps climbing where NDVI gets stuck.
🔬 Scientific / formula (revealed on click) — markdown + $$…$$ ok
`EVI = [(NIR − Red) / (NIR + C₁·Red − C₂·Blue + L)] · (1 + L)` **C₁ = 6.0, C₂ = 7.5, L = 1.0** (MODIS standard). Corrects NDVI for atmosphere (blue band) and soil (L).
💡 Mnemonic / memory aid (shown on hover)
EVI = Enhanced with the Blue band. Coefficients 6-7-1 (six-seven-one). Doesn't saturate in dense canopy like NDVI does.
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