The principle of vegetation mapping with drone is based on the spectral signature of plants (colour).
Healthy plants absorb intense solar radiation in the Red region (energy source for the photosynthetic process), and reflect intensely in the region of Green (G) and Near Infrared (NIR).
The multispectral sensor, which captures high resolution and detailed images, can measure the amount of radiation absorbed / reflected in each region of the spectrum, thus allowing the quantification of the health of the vegetation and the density of chlorophyll.
This way, it is possible to correlate these values with a) the biomass, b) the leaf area, c) the presence of pests and diseases, d) vegetative vigor and e) water stress.
The multispectral sensor has 4 bands, plus the RGB sensor: Green, Red, Red Edge and Near Infrared.
RGB (Red, Green, Blue)
Real colour (RGB)
RE (Red Edge)
Captures the radiation in the region between Red and Infrared
NIR (Near Infrared)
Captures radiation in the Near Infrared Region
Vegetation Indexes (NDVI)
Vigour and water stress mapping