Which are the 30 or 500 most important of Minnesota’s famous 10,000 lakes? Next, think about that question from the point of view of making a zoom-able map of the U.S. and how many lakes need to be shown as you zoom in. That question boils down to how to decide which polygons to show. Not all polygons are created equally, some are roughly round, some are banana shaped (like ox-bow lakes) some have lots of prongs (like a reservoir formed by U.S. Army Corps of Engineers dam), some are long and twisty like a pretzel. Read More...
