There is a wide range of cameras which can be fitted to a drone. NIR-cameras capture image data in the infrared portion of electromagnetic spectrum and are used primarily in the areas of high vegetation for the indication of biomass, monitoring the growth, differentiation of crops, indexing leaf areas and other purposes. RE-cameras capture image data in the red portion of electromagnetic spectrum and are used in the areas where the size of vegetation varies from low to high. They can be used for measuring vegetation stress, assessing drought, the indication of chlorophyll, analysis of the aging of vegetation and other purposes.
Obtained spectral photographs allow for the calculation of various spectral indexes, among which most important are vegetation indexes, indexes of soil moisture and vegetation stress, mineral indexes and other. They can also be used to determine the state of vegetation, crops and soil health or stress, changes in bodies of water, and other.