Virginia Department of Conservation and Recreation, Division of Natural Heritage 200802 vector digital data http://www1.usgs.gov/vip/rich/richaa.zip Karen Patterson 200806 document doi:10.5066/F7CN71W9 This shapefile depicts the locations of thematic accuracy assessment sampling points used in the vegetation mapping of Richmond National Battlefield Park. It was developed by the Virginia Department of Conservation and Recreation, Division of Natural Heritage. The data were created following general guidelines set forth by the USGS-NPS Vegetation Mapping Program. Accuracy assessment field work was performed in the summer of 2006 and Spring 2007 by staff of the Virginia Division of Natural Heritage. This data set was created to identify the locations of sampling points used to assess the thematic accuracy of the Richmond National Battlefield Park vegetation map. 200705 ground condition Complete None planned Richmond National Battlefield Park and environs -77.432654 -77.242591 37.600210 37.390187 None Vegetation map National Park Service Thematic accuracy assessment Vegetation association National Park System Unit Name Thesaurus Richmond National Battlefield Park National Park System Unit Code Thesaurus RICH Geographic Names Information System Hanover County, Virginia Henrico County, Virginia Chesterfield County, Virginia none Standardized National Vegetation Classification System vegetation classification alliance community association Kingdom Plantae None None Virginia Department of Conservation and Recreation, Division of Natural Heritage Ecologist mailing and physical

217 Governor Street

Richmond Virginia 23219 USA 804-786-5990 Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.1.1332 ESRI point geometry. Each accuracy assessment point is represented by one point in the shapefile. All points fall within vegetation map polygons. The number and distribution of accuracy assessment sampling points was determined by map class abundance and frequency as recommended in the USGS/NPS Vegetation Mapping protocols (The Nature Conservancy and Environmental Systems Research Institute 1994c), with one regional modification to accomodate the vegetation pattern seen in the park (Patterson 2008). A stratified random sampling approach was used, distributing the sampling effort across the USNVC map classes. Three cultural map classes, Cultural Meadow, Forested Earthworks, and Open Earthworks, and all Anderson II land use classes were excluded from the accuracy assessment. Successional Black Walnut Forest and Successional Shrub Swamp were also excluded since they each were represented by a single, very small polygon that was thoroughly surveyed during the mapping phase of the project. Seventy-one randomly selected accuracy assessment sampling points were generated using the Random Point Generator v. 1.3 (Jenness 2005) in ArcView 3.3. All points were reviewed over topographic maps and aerial photos. Points were reassigned if the randomly selected point fell on a road, outside the park boundary or if there were potential access limitations. In August and September 2006, and May 2007, all 71 accuracy assessment points were located in the field by VADNH staff using a Garmin Map76S WAAS enabled GPS. Field staff determined the map class at the accuracy assessment point using a dichotomous key to the vegetation map classes and detailed vegetation descriptions. 200705 Vector Entity point 71 Universal Transverse Mercator 18 0.999600 -75.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000064 0.000064 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 rich_veg_aa_2007 Shapefile attribute table Virginia Department of Conservation and Recreation, Division of Natural Heritage FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. AA_OBS_ID Accuracy assessment point number NPS four letter park code plus unique number NPS four letter park code plus unique number 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/rich.html Internet Access None 20080229 20100608 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