# CEOS LPV Stage 0-4 Validation Hierarchy
*methodology . standards*

The CEOS Land Product Validation (LPV) subgroup's Stage 0-4 hierarchy is the international standard for expressing validation maturity of satellite-derived land products. Stage 0 (no assessment) through Stage 4 (systematic, fiducial-reference-backed updates) defines the common scale against which products across twelve thematic focus areas (including Land Cover, Aboveground Biomass, Vegetation Index, and Evapotranspiration) are assessed and compared.

## Specifications
- **authority**: ceos
- **url**: https://lpvs.gsfc.nasa.gov/
- **last verified date**: "2026-05-18T00:00:00.000Z"
- **verified by**: agency-doc
- **claim status**: agency-verified

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Source: https://eo-atlas.org/standards/ceos-lpv
Maintainer: SpectraWorks B.V. (CC-BY 4.0)