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UFFDA
Water● In mapGMIE center-pivot layer (Harvard Dataverse doi:10.7910/DVN/HKBAQQ)

Center-pivot polygons from GMIE (UFFDA calls this set GCPIS)

Mapped center-pivot irrigation circles worldwide. The second dataset behind UFFDA's irrigated-fields layer.

What this is

Polygons of center-pivot irrigation systems — the circular fields a pivot arm sweeps — released as part of GMIE, a global maximum irrigation extent dataset. UFFDA uses them to tell whether a field boundary sits under a pivot, which the shape of the boundary itself cannot answer: field boundaries are drawn as parcels, so a pivot field is usually a square with a circle inside it. Naming, plainly: GCPIS is UFFDA's internal shorthand for this pivot layer, not the name the authors published it under. The upstream dataset is GMIE.

Why we surface it

Pivot or not is the single most useful thing to know about how a field is watered, and it is not recoverable from the boundary shape. This is the open dataset that supplies it.

What you can do with it

Shown for commercial use. Personal, research, and nonprofit use is often more permissive — switch the verdict lens on the catalog.

Internal / individual use
Public domain. Use it for anything — internal, resale, AI training, closed products. No attribution legally required (crediting the source is still the decent thing to do).
Redistribute the data
Public domain. Use it for anything — internal, resale, AI training, closed products. No attribution legally required (crediting the source is still the decent thing to do).
Republish a derivative
Public domain. Use it for anything — internal, resale, AI training, closed products. No attribution legally required (crediting the source is still the decent thing to do).
Build into a private product
Public domain. Use it for anything — internal, resale, AI training, closed products. No attribution legally required (crediting the source is still the decent thing to do).

This decoder is a starting point, not legal advice. For commercial deployment, run the actual license terms past someone who reads them for a living.

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