Description This package contains aggregated occurrence data ("occurrence cubes") for non-native taxa in Belgium and Europe. These occurrence cubes were generated by grouping species occurrence data from the Global Biodiversity Information Facility (GBIF) by year ( year ), 1x1km spatial EEA reference grid cell ( eea_cell_code ) and taxon ( taxonKey or classKey ). For each grouping, the number of occurrences found in GBIF ( n ) and the minimum coordinateUncertaintyInMeters ( min_coord_uncertainty ) are provided. The provided coordinateUncertaintyInMeters of an occurrence is taken into account when assigning it to a grid cell (see this code). The occurrence cubes are used as input data for indicators and risk modelling/mapping for the Tracking Invasive Alien Species (TrIAS) project. The occurrence cubes are built on open science principles and intended to be completely reproducible: The input data are publicly available on GBIF, with the download DOIs listed in the related identifiers of this package. The code ... : This work has been funded under the Belgian Science Policies Brain program (BelSPO BR/165/A1/TrIAS). ...