# 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: ndpoli
name: Normalized Difference Polarization Index
short_name: NDPolI
formula: (VV - VH)/(VV + VH)
bands:
- VV
- VH
domain: radar
theme: vegetation
concepts: []
rank: null
display:
  colormap: viridis
  range:
  - 0.0
  - 1.0
references:
- url: https://www.isprs.org/proceedings/XXXVII/congress/4_pdf/267.pdf
date_of_addition: '2022-04-19'
contributor: https://github.com/davemlz
platforms:
- Sentinel-1 (Dual Polarisation VV-VH)
source:
  authority: awesome-spectral-indices
  commit_sha: 7f28d3fe68af1287f7449faf0685659e73197212
  upstream_id: NDPolI
match_tags:
- difference
- index
- normalized
- polarization
- radar
- vh
- vv
status: stable