# 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: npci
name: Normalized Pigments Chlorophyll Ratio Index
short_name: NPCI
formula: (R - A) / (R + A)
bands:
- R
- A
domain: vegetation
theme: vegetation
concepts: []
rank: null
display:
  colormap: rdylgn
  range:
  - -0.2
  - 0.9
references:
- url: https://doi.org/10.1016/0034-4257(94)90136-8
date_of_addition: '2025-03-19'
contributor: https://github.com/MartinuzziFrancesco
platforms:
- Sentinel-2
- Landsat-OLI
source:
  authority: awesome-spectral-indices
  commit_sha: 7f28d3fe68af1287f7449faf0685659e73197212
  upstream_id: NPCI
match_tags:
- a
- chlorophyll
- index
- normalized
- pigments
- r
- ratio
- vegetation
status: stable