The FCUP team has participated in the 3rd Users Meeting of QGIS Portugal last 18 of June in Porto. The presentation It was entitled “Expansion patterns of alien invasive plants along roads: a remote sensing approach” and aims to demonstrate that the use of the plugin “QGIS Semi-Automatic classification” allows to reach one of the objectives of this study which is the spatial characterization of invasive plant species identified along the roads using remote sensing.