[Vineyard & Winery Elf EN](https://help.vineyardelf.com/index.md) / [VineyardElf](https://help.vineyardelf.com/vineyardelf.md)

# [NDVI Dashboard - how to read the data](https://help.vineyardelf.com/ndvi-dashboard-how-to-read-the-data.md)

The NanoSatellites dashboard shows the current condition of your vineyard based on the latest Sentinel-2 pass. The data refreshes automatically once a day.

## Map

The main element of the dashboard is a map with an NDVI overlay. The colors mean:

- brown/orange - bare soil or very weak vegetation (NDVI below 0.2)
- yellow/olive - moderate vegetation (0.2-0.4), typical in spring
- light green - good condition (0.4-0.6)
- dark green - lush vegetation (above 0.6)
- grey - pixels masked out by clouds

The overlay is 65% transparent, so the terrain map remains visible underneath.

## Parcel table

Below the map is a table with numeric data per parcel:

- **Mean NDVI** - the average NDVI value for the parcel. The main condition indicator
- **Min/Max** - the spread of values. A large gap between min and max suggests that part of the parcel is in better shape than the rest
- **Coverage** - the percentage of cloud-free pixels. With low coverage (below 30%) the data may not be very representative
- **Status** - a simplified assessment: healthy (above 0.5), moderate (0.3-0.5), stressed (below 0.3)

## What to do with this data

The key is to track changes over time rather than looking at a single reading. A 0.1 drop in NDVI over a week on one parcel, while the rest keep growing, is a signal - it is worth checking what is happening there. It could be drought, disease, or frost damage.

During the growing season (spring to early autumn) NDVI should rise from around 0.3-0.4 at the start to 0.6-0.7 at its peak. Sharp drops are always worth verifying in the field.

## First reading - example

Our first reading from a vineyard showed NDVI at around 0.35 for both parcels. That is normal for early spring - the vines are only just waking up after winter, buds are opening, and there is little foliage yet. Scene cloud cover was 24%, with pixel coverage of 12-16% (the rest hidden under clouds).