It's centre-pivot crop irrigation.

The process of identification for this image is based on the geospatial intelligence tradecraft of shape identification, familiarity and context.

The main features on this image are crops created by centre-pivot crop irrigation. This is a very efficient irrigation system most suitable for reasonably flat terrain and is often used in arid regions.

Through developing an understanding of the geospatial context of an area that is imaged – in this case, elevation and environment – and having a familiarity with the function of features we expect to see and how they may appear on satellite imagery, we are able to provide an insight into the activity.