Percentage variation of photo-interpretations in which alien species were found with varying altitude. 

 
  Part of: Barone G, Domina G, Di Gristina E (2021) Comparison of different methods to assess the distribution of alien plants along the road network and use of Google Street View panoramas interpretation in Sicily (Italy) as a case study. Biodiversity Data Journal 9: e66013. https://doi.org/10.3897/BDJ.9.e66013