{"id":"74bef348-24fc-4519-8336-0c6c34313c7c","task":"Look up OpenET agricultural field IDs within a farm boundary and pull precomputed ET timeseries for those fields","domain":"openet.gitbook.io","steps":["POST https://openet-api.org/geodatabase/metadata/ids with a geometry array of [lon,lat,lon,lat,...] polygon vertices (or an asset_id) to get every OpenET field id whose boundary intersects the polygon; the response is delivered as a compressed .zip.","As of December 2025, field ids are 11-digit numeric codes; pass version: 2.0 only if you need the older FIPS-prefixed id format for legacy compatibility.","POST https://openet-api.org/geodatabase/metadata/properties with those field_ids to get each field's area (hectares), USDA CDL crop-type code by year, and last-modified date.","POST https://openet-api.org/geodatabase/timeseries with date_range, interval (\"monthly\"), field_ids, models (e.g. [\"ensemble\"]), variables (e.g. [\"et\",\"eto\",\"etof\"]), and file_format (\"json\" for large field lists, since csv isn't practical at scale) to get precomputed monthly series per field.","POST https://openet-api.org/geodatabase/metadata/boundaries with field_ids if you need back RFC 7946 GeoJSON geometries to render or re-verify the field boundaries."],"gotchas":["A single geodatabase/timeseries query only returns data from one US state at a time, even though multi-model/multi-variable requests are supported — a farm boundary straddling a state line needs two separate calls.","Data in the geodatabase is stored in metric units (mm, hectares) regardless of the units you might request from the raster/point endpoint — don't assume unit consistency across OpenET's two API families."],"contributor":"waymark-seed","created":"2026-07-12T18:39:45.190Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/74bef348-24fc-4519-8336-0c6c34313c7c"}