John Young 2009 2.0 Fgdb raster digital data Vegetation of Shenandoah National Park in Relation to Environmental Gradients Version 2.0 Philadelphia, PA National ParkService http://www1.usgs.gov/vip/shen/shensat2.zip John Young Gary Fleming Wendy Cass Chris Lea 2009 Version 2.0 document National Park Service Technical Report NPS/NER/NRTR-2009/142 Philadelphia, PA National Park Service doi:10.5066/F78K772D This dataset consists of an ASTER satellite image collected on 6 September 2002. ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) is an imaging instrument flying on Terra, a satellite launched in December 1999 as part of NASA's Earth Observing System (EOS). The ASTER instrument consists of three separate instrument subsystems. The visible-near infrared (VNIR) subsystem operates in three spectral bands at visible and near-IR wavelengths, with a resolution of 15 m. The short wave infrared (SWIR) subsystem operates in six spectral bands in the near-IR region through a single, nadir-pointing telescope that provides 30 m resolution. The thermal infrared (TIR) subsystem operates in five bands in the thermal infrared region using a single, fixed-position, nadir-looking telescope with a resolution of 90 m. Aster images have a footprint of 60 km by 60 km and are available in several processing levels. Level 1A is the standard processing level which represents basic corrections to represent spectral radiance at sensor. Level 1B represents registered radiance at sensor and basic georeferencing. Level 2 products have additional processing to represent surface radiance, reflectance, or emissivity. The Level 2 surface reflectance data set (AST07) contains surface reflectance for each of the nine VNIR and SWIR bands at 15-m and 30-m resolutions, respectively. The results are obtained by applying an atmospheric correction to radiances reported by the ASTER sensor. The atmospheric correction removes effects due to changes in satellite-sun geometry and atmospheric conditions. The atmospheric correction algorithm is applied to clear-sky pixels only and the results are reported as a number between 0 and 1. This dataset represents the ASTER level 2 surface reflectance product with 3 bands of NIR and 6 bands of SWIR data combined and resampled to a 15 meter resolution image. An additional normalized difference vegetation index (NDVI) band was computed from the NIR and Red bands. Several individual ASTER images acquired on the same date were checked for image registration, formed into an image mosaic, and clipped to the boundaries of Shenandoah National Park. This image contains only the northern half of the SNP north district due to cloud cover. This imagery was used as part of an effort to map vegetation communities of Shenandoah National Park. 20020906 ground condition Complete None planned Shenandoah National Park and environs -78.289152 -78.147113 38.912169 38.740847 None Advanced Spaceborne Thermal Emission and Reflection Radiometer ASTER visible near infrared VNIR shortwave infrared SWIR normalized difference vegetation index NDVI National Park System Unit Name Thesaurus Shenandoah National Park National Park System Unit Code Thesaurus SHEN None SNP Virginia None None US Geological Survey John Young Research Biologist mailing address

USGS-LSC

11649 Leetown Road

Kearneysville WV 25430 USA 304-724-4469 304-724-4469 304-724-4465 jyoung@usgs.gov Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000 Values represent computed surface reflectance (%), stated absolute accuracy is 0.01 for reflectance <0.15, 7% for reflectance >0.15. Stated relative accuracy is 0.005. None None NASA JPL unknown raster digital data http://asterweb.jpl.nasa.gov/index.asp disc 20020906 Ground condition ASTER image 1 Satellite imagery for northern half of SHEN north district Compute normalized difference vegetation index (NDVI), from red and near infrared bands, store as band 10 in image file. 20080319 US Geological Survey John Young Research Biologist mailing address

USGS-LSC

11649 Leetown Road

Kearneysville WV 25430 USA 304-724-4469 304-724-4469 304-724-4465 jyoung@usgs.gov 0 Raster Pixel 1245 785 Universal Transverse Mercator 17 0.999600 -81.000000 0.000000 500000.000000 0.000000 row and column 15.000000 15.000000 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Surface reflectance Unknown ASTER project NASA-JPL 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/shen.html Internet Access None 20100202 20100513 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