What is the difference between undetected vines and canopy gaps?

Undetected vines are calculated using the vine spacing set at the block level, generally between 4-8 feet. This value should stay somewhat static throughout the growing season. Canopy gaps are a more granular calculation, at 50 cm increments. This value is likely to see more change as the canopy closes over throughout the year.

Why don’t my ground truth vine counts match the metrics?

There is a reasonable margin of error in the vine count metric due to the nature of aerial imaging. Common causes of inconsistency include irregular shadowing from adjacent objects, subjective row ends, and accidental inclusion of other vegetation features (i.e., decorative shrubs and small trees).

How are canopy gaps calculated?

Canopy gaps are calculated at 50 cm increments and are assigned a present or missing parameter. The resultant present length is calculated from a summation of all 50 cm present increments. Likewise, the resultant missing length is calculated from a summation of all 50 cm missing increments. Inconsistencies between the Canopy Gaps value and field…

How can I make use of zone maps?

Please read VineView Seasonal Use Cases. Alternatively, you can contact your sales representative to request a consultation.

How can I adjust the missing vine threshold?

It’s possible for newly planted fields to show up as undetected in the PureVine™ calculation. If you would like us to further calibrate the field, please contact support at

What is EVI and how is it different from NDVI?

Enhanced Vegetation Index is similar to Normalized Difference Vegetation Index; however, it includes additional wavelengths of light which improve the consistency of the measurement.

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