NDVI & crop analysis

Multispectral drone surveys: mapping plant health

A multispectral camera sees colours beyond the visible spectrum. With it we map the health of crops and vegetation via indices such as NDVI — field by field, plant by plant.

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What is a multispectral capture?

A multispectral camera records light in several bands, including near infrared. Healthy plants strongly reflect infrared; stressed or diseased plants much less. By combining those bands into indices such as NDVI we make differences in vitality visible before the eye notices them.

Applications

  • Precision agriculture: steering fertilisation and irrigation
  • Early detection of disease and stress
  • Yield estimation and field variation
  • Vegetation and nature monitoring
  • Environmental studies and land cover

Method

  1. Flight with a calibrated multispectral sensor and a light sensor.
  2. Radiometric correction for reliable index values.
  3. Calculation of NDVI and other indices.
  4. Delivery as maps and zonings for targeted intervention.

What you receive

  • NDVI and index maps (GeoTIFF)
  • Zoning and task maps
  • Orthophoto in visible light
  • Report with interpretation

Examples and applications

  • NDVI map of a field for variable fertilisation
  • Detection of drought stress in a field
  • Monitoring of a reforestation project
  • Monitoring of a nature area
  • Comparison of fields across the season
  • Land cover map for an environmental study

Related services

Ecological surveys Photogrammetry Thermography

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Frequently asked questions

What exactly is NDVI?

NDVI (Normalized Difference Vegetation Index) combines red and near-infrared light into a value between -1 and 1 that expresses the vitality of vegetation.

Can I steer my fertilisation with it?

Yes. Based on the zoning maps you can fertilise or irrigate variably, targeting the zones that need it.

How often should I fly?

For monitoring across the growing season several captures are useful; the frequency depends on the crop and the goal.

Is the measurement comparable over time?

With radiometric calibration and a light sensor, successive captures are reliably comparable.

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