Robert Welk 2019 1 vector digital data data release DOI:10.5066/P9JVMLFT Reston, VA U.S. Geological Survey https://doi.org/10.5066/P9JVMLFT This dataset includes New York State historical shoreline positions represented as digital vector polylines from 1880 to 2015. Shorelines were compiled from topographic survey sheets from the National Oceanic and Atmospheric Administration (NOAA). Historical shoreline positions can be used to assess the movement of shorelines through time. Rates of shoreline change were calculated in ArcMap 10.5.1 using the Digital Shoreline Analysis System (DSAS) version 5.0. DSAS uses a measurement baseline method to calculate rate of change statistics. Transects are cast from the reference baseline to intersect each shoreline, establishing measurement points used to calculate shoreline change rates. For wetland shorelines these rates can be interpreted as accretion or erosion. This data set is part of a cooperative agreement between USGS and New York State Department of Environmental Conservation to assess coastal wetland vulnerability within the state. Monitoring shoreline change enables quantification of land loss or gain over time, determined by the balance between erosion and accretion along coasts. Metrics such as this are valuable to management decision makers in evaluating long-term wetland viability. For coastal wetlands, erosion along the water boundary causes a loss of ecosystem services, such as habitat provision, carbon storage, and wave attenuation. 1881 2015 publication date Complete None planned -74.339243531 -71.765647864 42.922393709 40.460001069 USGS Thesaurus coastal processes shoreline accretion erosion wetland ecosystems None Shoreline Change Rate End-Point Rate Linear Regression Rate Woods Hole Coastal and Marine Science Center U.S. Geological Survey Digital Shoreline Analysis System estuary USGS Metadata Identifier USGS:5b439c29e4b060350a127035 None Great South Bay Peconic Bay Jamaica Bay Hudson River New York Bay United States New York State New York None Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. U.S. Geological Survey, Northeast Region Robert J Welk Hydrologic Technician mailing address

2045 Route 112

Coram NY 11727 US 631-736-0783 x141 rwelk@usgs.gov Environment as of Metadata Creation: Microsoft 10 Version 6.2 (Build 9200) ; Esri ArcGIS 10.5.1 (Build 7333) Emily Himmelstoss Amy S. Farris Rachel E. Henderson Meredith G. Kratzmann Ayhan Ergul Ouya Zhang Jessica L. Zichichi 2018 vector digital data U.S. Geological Survey Software DOI:10.5066/P91MNNSN Reston, VA U.S. Geological Survey https://code.usgs.gov/usgs/dsas/ https://doi.org/10.5066/P91MNNSN Emily A. Himmelstoss Rachel E. Henderson Meredith G. Kratzmann Amy S. Farris 2018 publication Open-File Report DOI:10.3133/ofr20181179 Reston, VA U.S. Geological Survey https://doi.org/10.3133/ofr20181179 https://woodshole.er.usgs.gov/project-pages/DSAS/ The data provided were compiled from NOAA Shoreline Data Explorer. The attributes are based on the requirements of the Digital Shoreline Analysis System (DSAS). These data were obtained from NOAA Shoreline Data Explorer and represent natural shoreline positions. This shoreline file is complete and contains all shoreline segments used to calculate shoreline change rates along sections of NYS coastal regions where shoreline position data were available. These data adequately represented the shoreline position at the time of the survey. Remaining gaps in these data, if applicable, are a consequence of non-existing data or existing data that did not meet quality assurance standards. Shoreline data have been acquired from 1880 to 2015 by NOAA. The horizontal accuracy varies with respect to data source from which the shorelines were digitized. NOAA provides historical accuracy of shorelines. If unavailable a default value of 4.4 m was used. National Oceanic and Atmospheric Administration 20110809 Vector Digital Data Set Silver Spring, Maryland NOAA's Ocean Service, National Geodetic Survey https://www.ngs.noaa.gov/NSDE/ online 18070701 20150701 Data Collection NOAA Used to complile historic shorelines in the study area for calculation of rate of change statistics. All shorelines in the study region were downloaded from NOAA Shoreline Data Explorer and merged into a single feature class. The feature class was queried using: CLASS = 'SHORELINE ' AND ( ATTRIBUTE = 'Natural.Apparent.Marsh Or Swamp' OR ATTRIBUTE = 'Natural.Great Lake Or Lake Or Pond' OR ATTRIBUTE = 'Natural.Mean High Water' OR ATTRIBUTE = 'Natural.Mean High Water.Approximate' ). Fields were added to shoreline attribute table as required by DSAS, 'DSAS_Date' and 'DSAS_uncy'. For all shoreline Features DSAS_Date received the value of SRC_DATE, after adjusting to the required MM/DD/YYYY format. DSAS_uncy received the value provided by HOR_ACC in the NOAA layer. If unavailable, a value of 4.4 was entered (default value provided by DSAS). A 'Dissolve' was performed using ArcMap's toolkit, with 'Dissolve Fields = SRC_DATE and DSAS_uncy', and the resulting layer was exported to a geodatabase in NAD_1983_UTM_Zone_18N (meter) Projection. 20180201 Vector Link 189 Universal Transverse Mercator 18 0.9996 -75.0 0.0 500000.0 0.0 coordinate pair 0.6096 0.6096 Meter D_North_American_1983 GRS_1980 6378137.0 298.257222101 Attribute Table Attribute information of features associated with digital vector shorelines used to calculate shoreline rate of change statistics for New York State coastal wetlands. U.S. Geological Survey DSAS_uncy Uncertainty of shoreline's horizontal position U.S. Geological Survey 1 7.4 meter DSAS_Date2 Date of shoreline survey U.S. Geological Survey 01/01/1881 06/03/2015 mm/dd/yyyy Shape_Leng Length of shoreline feature in meters ESRI 47.2122805775462 1051132.27729006 The entity and attribute information provided here describes the tabular data associated with the dataset. Please review the individual attribute descriptions for detailed information. U.S. Geological Survey ScienceBase U.S. Geological Survey mailing and physical

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. These data are available in a polyline shapefile format. The user must have software to read and process the data components of a shapefile. 20200825 Robert J Welk U.S. Geological Survey, Northeast Region Hydrologic Technician mailing address

2045 Route 112

Coram NY 11727 US 631-736-0783 x141 rwelk@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time