01365nam 2200397 450 991070365530332120150422105314.0(CKB)5470000002433158(OCoLC)907782087(EXLCZ)99547000000243315820150422d2015 ua 0engurcn|||||||||txtrdacontentcrdamediacrrdacarrierThe 3D Elevation Program summary for Pennsylvania /[by William J. Carswell, Jr.][Reston, Va.] :U.S. Department of the Interior, U.S. Geological Survey,[2015]1 online resource (2 unnumbered pages) color illustrations, color mapFact sheet ;2015-3019Title from title screen (viewed on Apr. 16, 2015)."March 2015."Includes bibliographical references (page [2]).3D Elevation Program Digital elevation modelsPennsylvaniaThree-dimensional imagingPennsylvaniaDigital elevation modelsThree-dimensional imagingCarswell William J.1387067Geological Survey (U.S.),GPOGPOBOOK9910703655303321The 3D Elevation Program3436533UNINA