The open source desktop geographic information system software QGIS can be a powerful tool for investigative journalists.
graph [rankdir=LR, splines=true, overlap=false, compound=true, fontsize=18, fontname=Helvetica, labelloc=t, label="Core ODE-Network Structure of the Fermentation ...
user-supplied function f(x, y). Peaks, valleys and the steepest point are detected from the grid and annotated on both plots, and their coordinates are also printed to the console.