Bergen Hill once stood tall in Brooklyn, before developers had it carted away for fill to make the Atlantic Docks of Red Hook.  Looking at historic maps from 1775, 1837 and 2004 cartographer Eymund Diegel determined that the hill, which was in...

This map contains community group research (Gowanus Canal Conservancy / Public Lab) on finding stream restoration opportunities in the Gowanus Watershed. It uses hydrological surface flow modeling by Eymund Diegel. This map looks at alternative...

You can see Red Hook and Gowanus shoreline changes in this illustration of two maps overlaid, the 1766 Ratzer map and one by Eymund Deigel using a 2004 NYC map.  Bernard Ratzer was a military surveyor who mapped the Gowanus marshes...

2013 Sandy Flood saline impacted tree survey by Eymund Diegel for the NYC Parks Department Text on map: "Gowanus / Red Hook Flood Impacts:  Post Sandy Flood Tree Leaf Out Percentages. Trees impacted by salt water ponding and salt water...

Sandy essentially flooded anyone who built on the former tidal marshes.  Map Explanation by mapmaker Eymund Diegel: Red lines are the upland Sandy flood lines (minus part the Fort Defiance Island area which is missing dry non flood area during...