# 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: evi2
name: Two-Band Enhanced Vegetation Index
short_name: EVI2
formula: g * (N - R) / (N + 2.4 * R + L)
bands:
- N
- R
constants:
- g
- L
domain: vegetation
theme: vegetation
concepts:
- fapar
- leaf-area-index
rank: 9
display:
  colormap: rdylgn
  range:
  - -0.2
  - 1.0
pedagogy:
  description: 'Two-Band Enhanced Vegetation Index (Jiang 2008). A blue-band-free

    reformulation of EVI tuned to track EVI closely on MODIS-class data.

    The default dense-canopy index when only red and near-infrared are

    available (Sentinel-3 OLCI subsets, RGB-NIR drones).

    '
  use_cases:
  - Dense-canopy phenology where atmospheric correction quality precludes EVI
  - Phenology modelling on legacy AVHRR-style sensors that lack a blue band
  - Drone and Planet-Dove vegetation monitoring (no blue available)
  limitations:
  - Diverges from EVI under heavy aerosols since it lacks the blue-band correction
  - Still saturates in extremely dense canopies — kNDVI is more robust at the high end
  - Coefficients (G=2.5, L=1, C=2.4) are MODIS-tuned; expect small offsets when ported to other sensors
  interpretation:
    high: Dense canopy
    mid: Open canopy, agricultural mosaic
    low: Sparse vegetation, soil
    negative: Water, cloud
  authoritative_sources:
  - label: Jiang 2008
    url: https://doi.org/10.1016/j.rse.2008.06.006
  - label: NV5 ENVI — Broadband Greenness
    url: https://www.nv5geospatialsoftware.com/docs/BroadbandGreenness.html
  - label: Index Database · EVI2
    url: https://www.indexdatabase.de/db/i-single.php?id=17
references:
- url: https://doi.org/10.1016/j.rse.2008.06.006
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: EVI2
match_tags:
- band
- enhanced
- index
- n
- r
- two
- vegetation
status: stable