The technological progress of the last century have remodeled the world we live in. Being part of a global community, we now have access to stagering quantity of data from a plurality of sources from which we can draw. However, just as it was the case in the days of wooden sailing ships crisscrossing the seas and mapping out the outlines of distant shores in the search of treasures and trade opportunities, it is now unthinkable to try to navigate spatial data without a guide. |