Sewall Vegetation Classification and Imagery for Block Island, Canaan Valley, Cherry Valley, Conscience Point, Elizabeth A. Morton, Erie, Featherstone, Great Swamp, James River, John H. Chafee, Mason Neck, Ninigret, Nomans Land Island, Occoquan Bay, Presquile, Patuxent Research Refuge, Rappahannock River Valley, Sachuest Point, Seatuck, Target Rock, Trustom Pond, Wallkill, Wertheim National Wildlife Refuges
James W. Sewall Company used its standard photointerpretation and ortho-mapping workflow on 112K acres across  the North Atlantic - Appalachian region. Refuges include: Block Island, Canaan Valley, Cherry Valley, Conscience Point, Elizabeth A. Morton, Erie, Featherstone, Great Swamp, James River, John H. Chafee, Mason …