EC-M-1.1 v1.4.2 Beta

Ecological Condition Index ECI

A 0–1 composite of physical state, chemical state, biological composition, structure, function, and landscape — under SEEA-EA.

ECI summarises ecological health for any parcel on Earth into a single number that downstream models can join on. Computed from the same six dimensions the methodology breaks out separately, so you can drill into any component when the composite isn't enough.

Twelve-month sample series

A representative parcel under EC-M-1.1, July 2025 through June 2026. The line is the published value at each monthly vintage; the band is the 95% confidence interval. Past vintages are immutable — this same chart, queried in 2040, returns the same values.

Ecological Condition Index (ECI) — sample monthly series

parcel us-vt-orange-a3f2 · methodology EC-M-1.1 · v1.4.2 · illustrative, not for citation

Sample · illustrative

Sample observation

A complete response object for this signal at a sample location and as-of date. Every field below appears on every observation; signal-specific structure lives under components.

200 OK · application/json GET /v1/signals/eci

{
  "signal_id": "eci",
  "version": "1.4.2",
  "methodology_version": "EC-M-1.1",
  "as_of": "2026-04-30",
  "vintage_pinned": true,
  "value": 0.6398,
  "components": {
    "physical": 0.71,
    "chemical": 0.62,
    "composition": 0.74,
    "structure": 0.58,
    "function": 0.51,
    "landscape": 0.68
  },
  "lineage": {
    "inputs_count": 12,
    "computation_graph": "https://api.earth-signals.com/v1/signals/eci/lineage/0xa3f2..."
  }
}

How to query

The signal is queried at the canonical /v1/signals/{id} endpoint. Required parameters are a location and an as-of date. The same query replayed in 2040 returns the same value.

curl https://api.earth-signals.com/v1/signals/eci \
  -H "Authorization: Bearer es_preview_..." \
  -d "lat=44.4654" \
  -d "lng=-72.6874" \
  -d "as_of=2026-04-30"

Endpoint and tokens shown for spec illustration. The Earth Signals API is in private beta with named design partners; the underlying Earth API and Calculator API are live.

The full parameter table — point query, parcel id, polygon aggregation, methodology pinning — is in the API reference.

Audiences that lean on this signal

Research & academia Universities, NGO scientists, government labs. Markets & trading Funds, market makers, structured-product desks. Indices & reference rates Index publishers, ETF issuers, benchmark administrators. Corporate disclosure & risk Sustainability, finance, and risk teams at large corporates. Public sector & multilateral Federal agencies, multilateral banks, sub-national governments. Conservation & mission Land trusts, conservation NGOs, restoration programs, philanthropic capital. Platforms & SaaS partners GIS platforms, ESG software, supply-chain tools, restoration registries. Press & public discourse Investigative reporting, science journalism, civic discourse. Legal & forensic Counsel, expert witnesses, environmental forensics. Education & civic Schools, museums, civic-engagement platforms.

Citation

Landseed PBC. Ecological Condition Index (ECI), version 1.4.2, methodology EC-M-1.1. Earth Signals canonical signal layer. DOI forthcoming.

Cite the catalog id, the signal version, the methodology version, and the as-of date. Together these define a reproducible observation forever — independent of methodology revisions.