North Carolina State University, Center for Earth Observation 20040915 final remote-sensing image http://www1.usgs.gov/vip/alpo/alpoortho.zip doi:10.5066/F7HH6H0X Orthorectified color infrared ERDAS IMAGINE image of Allegheny Portage Railroad NHS. Two separate photomosaics (final_alpo_a.img and final_alpo_b.img) were produced from 84 color infrared photos taken April 13, 2003. Orthorectification accomplished with IMAGINE Orthobase v8.6 software. RMSE is 1.18 meters meeting class 1 NMAS. The dataset was developed for use by Allegheny Portage Railroad NHS as a GIS component and for digital monoplotting and mapping. 20030413 ground condition Complete Unknown Allegheny Portage Railroad National Historic Site and environs -78.874668 -78.428606 40.479996 40.342153 none Orthorectification Color Infrared mosaic aerial photo CIR IMAGINE leaf-off none Pennsylvania National Park National Historic Railroad National Historic Site Allegheny Portage none 20030413 spring April none none Nathan Piekielek Data Manager mailing and physical address

208 C Ferguson Building

University Park Pennsylvania 16802 USA (814) 863-2320 Nathan_Piekielek@nps.gov Bill Millinor ERDAS Imagine IMG File and Mr. SID Compressed File none Allegheny Portage Railroad NHS Overall positional accuracy of 1.184640162 Horizontal accuracy was assessed on the basis of 55 field survey points distributed throughout the image. The actual field coordinates for these points were recorded with a Trimble ProXRS GPS unit with real-time differential correction with a minimum of 120 (usually 180 depending on field conditions) fixes per point. The field coordinates were then compared to the image mosaic coordinates for these points, determined in ESRI ArcView 3.3 software. USGS (http://seamless.usgs.gov) unknown model 30 meter online 20031125 20031125 dem elevation Kucrea International, Inc Unpublished Material remote-sensing image 6000 color ir aerial transparencies 20030413 ground condition photos Aerial view of Allegheny Portage Railroad NHS The photos (84 total) were used to create two orthorectified mosaics using ER Mapper 6.4 and ERDAS IMAGINE 8.6. The photos were scanned at 1200 dpi and imported into IMAGINE. A 30 meter DEM was downloaded from the NED and then resampled to 10 meters. The images were orthorectified using ERDAS IMAGINE Orthobase software and airborne GPS and IMU data. The orthorectified images were then mosaicked within ER Mapper to form two seamless basemap images for Allegheny Portage Railroad NHS. The mosaics were compressed using MrSID software at a 20:1 target compression ratio. (NOTE: the row and column counts below under Spatial_Data_Organization_Information were calculated by adding the values for the two mosaics.) 200312 NCSU, Center for Earth Observation mailing address

NCSU, Center For Earth Observation NCSU Campus Box 7106

Raleigh NC 27695-7106 USA 919-515-3430 919-515-3439 Raster Pixel 55299 60809 Universal Transverse Mercator 17 0.999600 -81.000000 0.000000 500000.000000 0.000000 Coordinate Pair 0.29709 and 0.297554 0.29709 and 0.297554 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Dataset consists of a raster 3 band color image. The bands are blue, green and near infrared. Each pixel contains a value between 0 - 255. none USGS/CSS/Core Science Analytics and Synthesis USGS-NPS Vegetation Characterization Program Coordinator mailing and physical address

Denver Federal Center, Building 810, MS 302

Denver Colorado 80225 (303) 202-4220 303-202-4219 gs-b-npsveg@usgs.gov Downloadable Data The U.S. Geological Survey and the National Park Service shall not be held liable for improper or incorrect use of the data described and/or contained herein. These data and related graphics (if available) are not legal documents and are not intended to be used as such. The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistent within the limitations of geospatial data in general and these data in particular. Any related graphics (if available) are intended to aid the data user in acquiring relevant data; it is not approriate to use the related graphics as data. The U.S. Geological Survey and the National Park Service gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data are directly acquired from an U.S. Geological Survey and National Park Service servers and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the utility of the data on another system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. Mention of trade names or commercial products in this metadata report does not constitute endorsement or recommendation for use by the U. S. Department of the Interior, U. S. Geological Survey and National Park Service. HTML http://www.usgs.gov/core_science_systems/csas/vip/parks/alpo.html Internet Access None Contact Natthan Piekielek 208 C Ferguson Building University Park, PA 16802 814-863-2320 Nathan_Piekielek@nps.gov 20061120 20100511 USGS/CSS/Core Science Analytics and Synthesis USGS-NPS Vegetation Characterization Program Coordinator mailing and physical address

Denver Federal Center, Building 810, MS 302

Denver Colorado 80225 (303) 202-4220 303-202-4219 gs-b-npsveg@usgs.gov FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata FGDC-STD-001.1-1999 http://www.usgs.gov/core_science_systems/csas/metadata/index.html