I have a few high resolution watershed or drainage basin maps for sale via RedBubble. Low resolution previews of those available here:
Hudson River: raw landscape, modified landscape, full map
Delaware River: raw landscape, modified landscape, full map
Chesapeake Bay: raw landscape, modified landscape, full map
Potomac River: raw landscape, modified landscape, full map
Patuxent: full map |
Delmarva: full map |
Shenandoah: full map |
Rappahannock: full map |
York: full map |
James: full map |
Albemarle/Roanoke: full map |
Pamlico/Neuse: full map |