New York Natural Heritage Program 20070630 vector digital data http://www1.usgs.gov/vip/gate/gateaa.zip New York Natural Heritage Program 20070630 technical report http://www.usgs.gov/core_science_systems/csas/vip/parks/gate.html doi:10.5066/F7QZ27W3 Location of thematic accuracy assessment sampling points, that were field sampled, based on the destination accuracy assessment points used in the vegetation mapping in Gateway National Recreation Area. To identify the locations of the accuracy assessment points that were field sampled, and used to assess the thematic accuracy of the vegetation association maps in Gateway National Recreation Area. 20070630 ground condition Complete None planned Gateway National Recreation Area and environs -74.137313 -73.816016 40.658032 40.398751 none thematic accuracy assessment vegetation community classifcation vegetation association map National Park Service none Gateway National Recreation Area New York New Jersey None Standardized National Vegetation Classification System vegetation classification alliance community association Kingdom Plantae none none New York Natural Heritage Program Greg Edinger Chief Ecologist mailing and physical address

625 Broadway, 5th floor

Albany New York 12233-4757 USA (518) 402-8947 (518) 402-8925 gjedinge@gw.dec.state.ny.us http://www1.usgs.gov/vip/gate/gateaa.pdf Locations of thematic accuracy assessment sites; low resolution for web browsing. PDF New York Natural Heritage Program 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 representaed by one point in the shapefile. All points fall within vegetation association polygons. From July 12 to October 19, 2006 each Accuracy Assessment Destination Point was located in the field using a Magellan SporTrak GPS unit (26 field days total). The datum on the GPS units was set to North American 1983 (Conus) and the coordinate system was set to Universal Transverse Mercator (UTM) zone 18. In most cases, three vectors (i.e., bearing and distance) were used to get within 10 m of AA destination points for open communities, or 20 m for forested communities, while remaining entitrely within the target polygon as best as possible. These cut-off levels were selected based on the plot size recommended for those types. Accuracy assessment data were collected digitally in the field using an iPAQ hand-held computer with data entry software (NY Natural Heritage Hand-Held Database - HHDB) and imported to the NY Natural Heritage Field Form Database (FFDB). 331 accuracy assessment points and 37 reference observation points were sampled at Gateway National Recreation Area in 2006. 20070630 New York Natural Heritage Program Greg Edinger Chief Ecologist mailing and physical address

625 Broadway, 5th floor

Albany New York 12233-4757 USA (518) 402-8947 (518) 402-8925 gjedinge@gw.dec.state.ny.us Vector Entity point 331 Universal Transverse Mercator 18 0.999600 -75.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000001 0.000001 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GATE_aa_sampled_2006 Shapefile attribute table New York Natural Heritage Program FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. AAOBS_CODE ID Code for Accuracy Assessment field-sampled points New York Natural Heritage Program GATE.1 GATE.332 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 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/gate.html Internet Access None 20071009 20100526 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