Christos Chalkias conceived of the study, designed the analysis, carried out its implementation and
drafted the manuscript. Maria Ferentinou participated in the design and implementation of the study
and in the preparation of the validation dataset. Christos Polykretis participated in the spatial database
creation, and the implementation of statistical analysis. Christos Chalkias, Maria Ferentinou and
Christos Polykretis participated in the revision of the manuscript. All authors read and approved the
final manuscript.