Conceptual graph describing the process leading to the distribution of the R package lydemapr. Data are collected by individual sources through multiple surveying processes. The datasets compiled this way are gathered from the sources and individually processed, then combined into a single comprehensive dataset. This is anonymised through both a censoring step and a spatial transformation to reduce spatial resolution. For the spatial transformation, latitude and longitude of individual survey points are rounded to the centroids of a 1-km2 resolution grid. The aggregated and anonymised dataset is distributed through the package, together with functions to visualise the spread of the invasion through time.