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 have been used as input data for indicators and risk modelling/mapping for the Tracking Invasive Alien Species (TrIAS) project and are now used for monitoring the effectiveness of the early detection and rapid eradication of emerging Invasive Alien Species (IAS) for the LIFE RIPARIAS project. The occurrence cubes are built on open science principles and intended to be ... : This version updates the occurrence cubes with more recent occurrence data, see datasets mentioned in Related works. The occurrence cube for alien taxa of Belgium is also based on a new version of the GRIIS checklist (Desmet et al. 2019) published on September 20, 2023. ...