Taranis Field Health Insight – Hotspot detection

With Field Health Insight,  you can save time by identifying problem areas in the field more efficiently, allowing quick decisions regarding crop stress before yield can be impacted.

The new version of Field Health Insights provides you with “hotspot detection”, indicating areas behaving significantly different from the rest of the field.  Together with SmartScout, you will be able to ground-truth Field Health’s indicators and see the complete and accurate cause of the stress at the leaf level.

So what is the new Field Health all about?

Today, we are still comparing one layer with another, analyzing the trend of NDVI values, pixel by pixel, throughout the whole field.

The difference from the current model is that we are no longer working with absolute thresholds. Instead, we are looking at the distribution of NDVI differences between the layers, putting them on a statistical chart, known as a “bell curve”, where you have the average values below and above average. 

We mark areas that are significantly below and above average areas, meaning 2 STD or more, with polygons.

2 STD below avg.     Average   2 STD above avg.

Current Field Health Insight

The current Field Health Insight indicates significant negative health change, so if the whole field’s NDVI values have changed beyond the absolute threshold, there will be no indication of areas behaving differently than other areas.

New Field Health Insight

The new Field Health insight marks hotspot areas that behave significantly different from the rest of the field and differentiate areas below or above field average, which may result from various agronomic phenomena.

How does it work?

The map colouring differentiates the green and red areas.

Green indicates the average values, meaning the majority of the field, which we believe is behaving as expected.

Red indicates the areas behaving significantly different than the rest of the field, either below or above the average. We believe that any abnormal behaviour should be further inspected, therefore marked.

The blue and purple contour surrounding the red coloured “hotspots” indicates whether the hotspot is above or below average. Upon hovering over the hotspots, a tooltip will appear, indicating that the area is above or below average, its size and the percentage of the field.

The insight data on the left-hand side presents the sum of the percentage of the field area that is significantly below or above field average, marked with polygons. The area size is shown right next to the percentage.

Below the percentage, the NDVI average is presented to understand the trend of the entire field. In addition to offering the latest NDVI layer’s average, there is an indication of the average trend between the two layers:

  • Arrow going up – indicating that the field average went up
  • Arrow going down – indicating that the field average went down
  • “No Change” – indicating that there was no change in field average

In addition, we have improved the user experience by providing the compared NDVI images as part of the insight. Clicking any of the two images will open the NDVI layers for further observation.

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