Built to be cited.

What you get on the Research tier

• Full catalog access Every signal in the catalog, at standard frequency, at parcel resolution, for any geography Earth Signals covers.
• Vintage pinning Every query is locked to its as-of date. The same query replayed in a decade returns the same numbers — independent of any methodology update since.
• Computation lineage on every observation A queryable URL on every value that returns the inputs, the methodology version, the timestamps, and the content hashes used to derive it.
• Citable methodology version Every observation carries the methodology version it was computed under. Cite it; it's permanent.
• Exports for reproducibility appendices Bundles for paper supplementary material — the queries you ran, the values you got, the lineage receipts. Anyone can rebuild your analysis.

No-cost for non-commercial academic and non-profit publication. Attribution required. The full licence terms are available with the access agreement.

How to cite

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 or signal updates that happen later.

Standards we build on

EC-M-1.1 sits on a stack of established standards. Citations below are the load-bearing ones; the methodology page has the full bibliography.

• UN SEEA-EA (2021) System of Environmental-Economic Accounting — Ecosystem Accounting. The condition typology Earth Signals operationalises.
• IUCN Red List of Ecosystems & GET Ecosystem rarity and replaceability inputs to the Threat Multiplier.
• GEO BON Essential Biodiversity Variables Frames the compositional and structural dimensions of EC-M-1.1.
• Greco et al. (2019) Penalised geometric mean used in the Ecological Condition Index. Catches weak dimensions.
• Dinerstein et al. (2017) Ecoregion classification and the Nature Needs Half framework.
• Kennedy et al. (2020) Global Human Modification map — one of three independent inputs to the Threat Multiplier.

Working papers and validation

Earth Signals' first methodology paper and the validation study for EC-M-1.1 are in preparation for 2026 submission. As preprints and accepted manuscripts land they appear here with DOI, supplementary data, and the pinned signal vintages used in each analysis.

The methodology committee co-publishes validation work where the signal touches a regulated domain (parametric reinsurance, benchmark administration). If your work would benefit from co-publication, get in touch with hello@landseed.earth.

Apply for research access

Email hello@landseed.earth with a one-line description of the work and an academic affiliation. Most requests are approved within a working day. We'll send back a short acceptable-use undertaking and an API token scoped to the catalog.