# Generated by scripts/sync_indices.py from Awesome Spectral Indices (MIT).
# DO NOT EDIT BY HAND. Edit overlays (_asi_*.yaml, _folia_*.yaml) and re-run.
# Spec: docs/spec/SPECTRAL_INDICES.md
slug: evi
name: Enhanced Vegetation Index
short_name: EVI
formula: g * (N - R) / (N + C1 * R - C2 * B + L)
bands:
- N
- R
- B
constants:
- g
- C1
- C2
- L
domain: vegetation
theme: vegetation
concepts:
- fapar
- leaf-area-index
- crop-biomass
rank: 5
display:
  colormap: rdylgn
  range:
  - -0.2
  - 1.0
pedagogy:
  description: 'Enhanced Vegetation Index (Huete 2002). A three-band index that

    adds the blue band to correct for aerosols and a soil-adjustment

    term to reduce background noise. The MODIS-canonical alternative

    to NDVI in dense canopies.

    '
  use_cases:
  - High-biomass vegetation monitoring where NDVI saturates (tropical forest, peak-season cropland)
  - Long-term phenology and productivity modelling (MODIS MOD13 baseline)
  - Aerosol-robust greenness in tropical and post-volcanic atmospheres
  limitations:
  - Requires an aerosol-corrected blue band — atmospheric correction quality directly affects values
  - Tunable constants (G=2.5, C1=6, C2=7.5, L=1) are MODIS defaults; sensor-specific re-tuning may be needed
  - Cannot compute when blue is missing or saturated — fall back to EVI2
  interpretation:
    high: Dense, structurally complex canopy
    mid: Open canopy, mixed cover
    low: Sparse vegetation, soil-dominated
    negative: Water, cloud
  authoritative_sources:
  - label: Huete 2002
    url: https://doi.org/10.1016/S0034-4257(02)00096-2
  - label: NV5 ENVI — Broadband Greenness
    url: https://www.nv5geospatialsoftware.com/docs/BroadbandGreenness.html
  - label: Index Database · EVI
    url: https://www.indexdatabase.de/db/i-single.php?id=16
references:
- url: https://doi.org/10.1016/S0034-4257(96)00112-5
date_of_addition: '2021-04-07'
contributor: https://github.com/davemlz
platforms:
- Sentinel-2
- Landsat-OLI
- Landsat-TM
- Landsat-ETM+
- MODIS
- Planet-Fusion
source:
  authority: awesome-spectral-indices
  commit_sha: 7f28d3fe68af1287f7449faf0685659e73197212
  upstream_id: EVI
match_tags:
- b
- enhanced
- index
- n
- r
- vegetation
status: stable