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...詹姆斯·W·休厄尔公司（James W. Sewall Company）针对北大西洋-阿巴拉契亚区域内的11.2万英亩土地，采用其标准影像解译（photointerpretation）与正射制图（ortho-mapping）工作流开展作业，涉及保护区……