The height of the surface is proportional to the average price (Euro/m²) for building lots in Germany. The surface is interpolated using the p...

The height of the surface is proportional to the population density in Germany, measured by the number of inhabitants per km² in 2008. The sur...

I must go down to the seas again, to the lonely sea and the sky. And all I ask is a tall ship and a star to steer her by. And the wheel's kick an...

The height of the surface in the model is proportional to the Gross National Product (GNP)  in Germany, measured in 1000 Euros per inhabitant ...