Fig. 2

Comparison of field samples. Image (a) shows a typical example of a communitarian urban garden. The land parcel is divided between several individuals and used to plant multiple types of crops, including fruit trees. Such cases are hard to interpret with remote sensing due to mixed pixel effects. Image (b) depicts a field where crops share the managed areas with buildings. Excluding the building is essential to accurately depict the spectral signature of the cultivated area. Image (c) shows an ideal case, where the field was cultivated with a single crop with no additional structures within it. Due to their homogeneity, such fields help discriminate crop specific spectral signatures.