Agriculture and Conservation

Data Analysis for Precision Agriculture

Precision agriculture is a farming management concept based on observing, measuring and responding to inter and intra-field variability in crops. Our Unmanned aerial vehicles can be used to provide a more accurate assessment of the condition of the field, this information can in turn be used in the decision making process and quantification of use of fertilizers, determination of irrigation frequency and quantity, disease prevention and treatment, and aid in other tasks such as prediction of crop yields.

Our UAVs can make scheduled flights at specific times during the growing season. This allows our customers to have up to date information on the health of their crops, and to detect problems early on like clogged irrigation systems, or lack of nutrients in the soil in certain areas, that would otherwise be difficult to detect from a ground perspective.

Measuring Vegetation Indices

Vegetation Indices are combinations of surface reflectance at two or more wavelengths designed to highlight a particular property of vegetation. They are derived using the reflectance properties of vegetation. By flying over an area with special multi-spectral or hyperspectral cameras, our UAVs can capture different wavelenghts of light and use that information to generate vegetation indices like NDVI, SAVI, and EVI. These are some of the applications on which these indices can be of use:

  • Detection of water stress on crops for efficient water management
  • Detection of nutritional stress in crops
  • Early detection of diseases and pests in crops
  • Quality indexes of crops
  • Inventory management of crop areas
  • Monitoring of sprayed areas

Easy access to your data

Droidika offers an easy-to-use solution to produce and deliver georeferenced, aerial images and high resolution color and NDVI maps and reports within hours of collection. These results can be hosted on the cloud for easy access from any device, either in the office, or on a mobile device in the field. Droidika’s results are provided in different formats such as Google Earth or other standard GIS formats, allowing easy interoperability with precision ag software like SST, AgLeader SMS, and SoilMap.

FAQ´s

The normalized difference vegetation index (NDVI) is a simple graphical indicator that can be used to analyze remote sensing measurements. Live green plants reflect most of the light in the NIR section of the spectrum because absorbing these wavelengths would only result in overheating the plant and possibly damaging the tissues. Thus live green plants appear quite bright in this section of the spectrum.

On the other hand chlorophyll absorbs most of the incoming visible light (from 0.4 to 0.7 µm) for use in photosynthesis. Therefore photosynthetically active plants appear rather dark in the visible part of the spectrum. The NDVI is calculated from these individual measurements as follows:

NDVI Formula

Resulting values between 0.0 and 1.0 represent areas with plant activity with the larger values representing higher photosynthetically active plants.

Using high resolution cameras on UAVs we can get:

  • High resolution, low distortion camera
  • Plant counts
  • Automatic plant row detection
  • Irrigation System Monitoring
  • Counter lines and drainage analysis
  • Surveillance
  • Surveying and land use applications
Multi-spectral sensors differ from regular cameras in their ability to capture wavelenghts other than the tradition RGB bands. Using this type of cameras our UAVs can be used to:

  • Measure plant health
  • Asses water quality
  • Calculate vegetation indices
  • Identify nutrient levels in the soil

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