# 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: ndtilli
name: Normalized Difference Tillage Index
short_name: NDTillI
formula: (S1 - S2)/(S1 + S2)
bands:
- S1
- S2
domain: vegetation
theme: vegetation
concepts: []
rank: null
display:
  colormap: rdylgn
  range:
  - -0.2
  - 0.9
references:
- url: https://www.asprs.org/wp-content/uploads/pers/1997journal/jan/1997_jan_87-93.pdf
date_of_addition: '2025-10-11'
contributor: https://github.com/davemlz
platforms:
- Sentinel-2
- Landsat-OLI
- Landsat-TM
- Landsat-ETM+
- MODIS
source:
  authority: awesome-spectral-indices
  commit_sha: 7f28d3fe68af1287f7449faf0685659e73197212
  upstream_id: NDTillI
match_tags:
- difference
- index
- normalized
- s1
- s2
- tillage
- vegetation
status: stable