Usage of the excel tool:
Sheet 'readme': Here some basic information on how the data sheet must be filled are given.
Sheet 'data': Here data need to be entered. The template is pre-filled with the data of the European Nitrogen Budget (Leip et al., 2011) as an example. Own data and meta-data need to be entered in columns K-R
Sheet 'map': Here data from sheet 'data' are used to compile a set of flows that are visualised in the sankey diagram. The sheet contains explanation as of where to click to trigger the macro and draw the (updated) NiNB.