Metadata: Identification_Information: Citation: Citation_Information: Originator: Kate V. Ackerman Originator: Brian D. Andrews Originator: Neil K. Ganju Originator: Zafer Defne Publication_Date: 20251211 Title: Geospatial data in support of structured decision making for Harriet Tubman Underground Railroad National Historical Park, Maryland Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P13E2NM2 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Online_Linkage: https://doi.org/10.5066/P13E2NM2 Online_Linkage: https://www.sciencebase.gov/catalog/item/68a629c3d4be021c47116427 Larger_Work_Citation: Citation_Information: Originator: Kate V. Ackerman Originator: Brian D. Andrews Originator: Neil K. Ganju Originator: Zafer Defne Publication_Date: 2025 Title: Geospatial data in support of structured decision making for northeast coastal parks Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P13E2NM2 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Ackerman, K.V., Andrews, B.D., Ganju, N.K., and Defne, Z., 2025, Geospatial data in support of structured decision making for northeast coastal parks: U.S. Geological Survey data release, https://doi.org/10.5066/P13E2NM2. Online_Linkage: https://doi.org/10.5066/P13E2NM2 Online_Linkage: https://www.sciencebase.gov/catalog/item/685eb64cd4be025490e9e690 Description: Abstract: Salt marshes provide a range of ecosystem services, including storm protection, recreation, and commercial fishery habitat provision. The National Park Service (NPS) aims to preserve and protect salt marshes in order to achieve multiple objectives which address their mission: to preserve unimpaired the natural and cultural resources and values of their publicly held lands. Ongoing threats, including sea-level rise, sediment deficits, invasive species, and anthropogenic pressure have led to substantial salt marsh loss in the northeast US over the last century prompting increased investment in their protection and restoration. Here we describe a structured decision making (SDM) framework involving eight NPS units designed to help guide restoration planning and investment, through identification of priority marshes. The framework was developed first through a facilitated workshop with all units, followed by unit-specific workshops where priorities were adjusted to reflect the natural and cultural resources within the unit. The final product is a series of maps depicting performance metrics over a consistent geospatial framework. Integration of these metrics into decision support tools will help guide marsh restoration investments through identification of marsh units and complexes that maximize agency priorities and objectives. This dataset represents the regional and unit-specific metrics generated for Harriet Tubman Underground Railroad National Historical Park (HATU). Purpose: This shapefile provides the geospatial metrics generated for Harriet Tubman Underground Railroad National Historical Park (HATU) to be used in the structured decision making (SDM) process. Supplemental_Information: All links for cited references and data portals were valid at the time of the work, but support for these web resources may change over time. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2025 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -76.289463 East_Bounding_Coordinate: -75.999751 North_Bounding_Coordinate: 38.505266 South_Bounding_Coordinate: 38.409532 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: geospatial datasets Theme_Keyword: wetland ecosystems Theme_Keyword: wetland functions Theme_Keyword: coastal ecosystems Theme_Keyword: coastal processes Theme_Keyword: sea-level change Theme_Keyword: sediment transport Theme_Keyword: estuarine processes Theme_Keyword: vegetation Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: National Park Service Theme_Keyword: NPS Theme_Keyword: structured decision making Theme_Keyword: SDM Theme_Keyword: salt marsh Theme_Keyword: marsh health Theme_Keyword: estuary Theme_Keyword: UVVR Theme_Keyword: Lifespan Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: inlandWaters Theme_Keyword: environment Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:68a629c3d4be021c47116427 Place: Place_Keyword_Thesaurus: None Place_Keyword: Atlantic Ocean Place_Keyword: United States Place_Keyword: Maryland Place_Keyword: Dorchester County Place_Keyword: Blackwater National Wildlife Refuge Place_Keyword: Harriet Tubman Underground Railroad National Historical Park Place_Keyword: HATU Access_Constraints: No access constraints. Please see 'Distribution Information' for details. Use_Constraints: Each marsh unit is defined for scientific research purposes and should not be used as a sole source of reference for any regulations and policy making. These data are marked with a Creative Commons CC0 1.0 Universal License. These data are in the public domain and do not have any use constraints. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Kate V. Ackerman Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Contact_Voice_Telephone: 508-548-8700 x2331 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: kackerman@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/68a629c3d4be021c47116427/?name=HATU_SaltMarsh_Browse.png&allowopen=true Browse_Graphic_File_Description: Graphic showing the HATU salt marshes Browse_Graphic_File_Type: PNG Native_Data_Set_Environment: Environment as of Metadata Creation: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS Pro (version 3.2.1) Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Marsh units, and water and land boundaries, inherit their accuracy from the vertical and horizontal accuracy of the elevation data (source of elevation data is found in Defne and others, 2023), as well as the accuracy of the wetland demarcation provided by the U.S. Fish and Wildlife Service National Wetland Inventory (USFWS NWI). Logical_Consistency_Report: Marsh units were evaluated for geoprocessing topology errors and, if found, errors were fixed and validated. The polygons were checked for correct geometry and do not overlap. A visual comparison between NAIP imagery was performed at randomly selected sites to verify the land and water boundaries. For UVVR, marsh polygons without any vegetation were assigned a value of -1. For lifespan, negative values indicate the estimated lifespan is depleted and loss is imminent and some flagged units (see description for the FLG variable) are assigned a lifespan estimate of -9999. Completeness_Report: The results are specific to the marsh polygons defined within the boundaries of the Harriet Tubman Underground Railroad National Historical Park (HATU) salt marsh complex. A detailed on-the-ground analysis of a single site may result in a different interpretation of the wetland and marsh unit boundaries. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Horizontal accuracy is inherited from the source dataset (Defne and others, 2023) that delineates the marsh units and is considered to be +/- 6 meters (m). Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Because the elevation values are averaged over delineated polygons, vertical accuracy of marsh unit elevation depends on both the horizontal accuracy of NWI dataset and the vertical accuracy of source elevation data (CoNED). CoNED vertical elevation accuracy was 0.2 m. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Z. Defne Originator: N.K. Ganju Originator: K.V. Ackerman Publication_Date: 2023 Title: Lifespan of Chesapeake Bay salt marsh units Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9FSPWSF Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Online_Linkage: https://doi.org/10.5066/P9FSPWSF Online_Linkage: https://www.sciencebase.gov/catalog/item/63a32f2bd34e176674f520ee Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2023 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: mu_lifespan_CB.shp Source_Contribution: This shapefile is used as a starting point for the SDM metrics shapefile published here (HATU_SDM_Metrics.shp). The marsh unit unique identification number (FID_CMU), the total area of the marsh unit (ATOT_M2), the area of the vegetated portion of the marsh unit (AVEG_M2), the lifespan under global mean sea-level rise of 0.5m and 1.0m by 2100 (GMSL05, GMSL10), the unvegetated to vegetated marsh ratio (UVVR), and flagged anomalous units (FLG) are all carried from the source shapefile (mu_lifespan_CB.shp) into the HATU_SDM_Metrics.shp shapefile. Downloaded in April 2024. Source_Information: Source_Citation: Citation_Information: Originator: J.R. Holmquist Originator: L. Windham-Myers Publication_Date: 2021 Title: Relative Tidal Marsh Elevation Maps with Uncertainty for Conterminous USA, 2010 Geospatial_Data_Presentation_Form: raster digital data Publication_Information: Publication_Place: Oak Ridge, TN Publisher: ORNL DAAC Online_Linkage: https://doi.org/10.3334/ORNLDAAC/1844 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: relative_tidal_elevation.tif Source_Contribution: Used the relative tidal elevation (elevation normalized to the tidal range), termed Zstar (Z*). Z* = (orthometric elevation (m) - mean sea level (m)) / (mean high water (m) - mean sea level(m)). Downloaded in April 2024. Source_Information: Source_Citation: Citation_Information: Originator: Z. Defne Originator: K.V. Ackerman Originator: B.D. Andrews Originator: N.K. Ganju Publication_Date: 2025 Title: Metrics for marsh migration under sea-level rise in Chesapeake Bay Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P18BWN2U Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Online_Linkage: https://www.sciencebase.gov/catalog/item/677d4d5dd34e480c9507fa29 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2023 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: mu_migration_CB.shp Source_Contribution: Marsh migration potential values for Chesapeake Bay marsh units. Downloaded in March 2025. Source_Information: Source_Citation: Citation_Information: Originator: U.S. Fish and Wildlife Service Publication_Date: 2020 Title: National Wetlands Inventory Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Washington, D.C. Publisher: U.S. Fish and Wildlife Service Online_Linkage: https://www.fws.gov/wetlands/data/Data-Download.html Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2020 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: NWI.shp Source_Contribution: Downloaded the wetlands data for Maryland in January 2020. Source_Information: Source_Citation: Citation_Information: Originator: E.K. Peck Originator: J.E. Walker Originator: J.D. Woodruff Originator: N.K. Ganju Publication_Date: 2024 Title: Linear Ditches of Northeastern U.S. Coastal Marshes from Maine to Virginia Derived from 2023 2D Aerial Imagery Basemap Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P13WF8ZT Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P13WF8ZT Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2024 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: NortheastUSDitches_Polyline.shp Source_Contribution: Ditches shapefile. Downloaded in March 2024. Source_Information: Source_Citation: Citation_Information: Originator: Virginia Institute of Marine Science Publication_Date: 20231213 Title: Submerged Aquatic Vegetation (SAV) Beds 2022 Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Gloucester Point, VA Publisher: Virginia Institute of Marine Science Online_Linkage: https://www.vims.edu/research/units/programs/sav/reports/ Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2023 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: SAV.shp Source_Contribution: Shapefile of the location of SAV beds. Downloaded in February 2024. Source_Information: Source_Citation: Citation_Information: Originator: Maryland Biodiversity Conservation Network Publication_Date: 2018 Title: Biodiversity Conservation Network - BioNet Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: https://data.imap.maryland.gov/datasets/maryland::maryland-biodiversity-conservation-network-bionet/about Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2018 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: BioNet Source_Contribution: Dataset of ecologically important lands. Downloaded in October 2024. Source_Information: Source_Citation: Citation_Information: Originator: National Park Service Publication_Date: 2024 Title: HATU_Features Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: https://services3.arcgis.com/17F7m6SrhCakwCcI/arcgis/rest/services/HATU_Features/FeatureServer Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2024 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: HATU_Features Source_Contribution: Building locations. Downloaded in January 2025. Source_Information: Source_Citation: Citation_Information: Originator: T.K. Sterne Originator: E.A. Pendleton Originator: E.E. Lentz Originator: R.E. Henderson Publication_Date: 2023 Title: Coastal Change Likelihood in the U.S. Northeast Region: Maine to Virginia- Maximum Change Likelihood Edition: 1.0 Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P96A2Q5X Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://www.sciencebase.gov/catalog/item/6197cb8dd34eb622f692ee19 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2023 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: USGS_CCL_MaximumCCL_2022.tif Source_Contribution: Dataset that estimates the coastal change likelihood across the Northeast. Downloaded in March 2024. Source_Information: Source_Citation: Citation_Information: Originator: K.V. Ackerman Originator: Z. Defne Originator: N.K. Ganju Publication_Date: 2022 Title: Conceptual marsh units of Chesapeake Bay salt marshes Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P997EJYB Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Online_Linkage: https://www.sciencebase.gov/catalog/item/630f9b40d34e36012efa091d Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2022 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: CMU_CB Source_Contribution: Conceptual marsh units that have vegetated and unvegetated polygons delineated. Downloaded in April 2024. Source_Information: Source_Citation: Citation_Information: Originator: V.L. Woltz Originator: C. LaFosse Stagg Originator: K.B. Byrd Originator: L. Windham-Myers Originator: A.S. Rovai Originator: Z. Zhu Publication_Date: 2023 Title: Biomass Carbon Stock and Net Primary Productivity in Tidal Herbaceous Wetlands of the Conterminous United States Edition: 1.0 Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9I1PCLS Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9I1PCLS Online_Linkage: https://www.sciencebase.gov/catalog/item/6419e5b6d34eb496d1d29ca1 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2023 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: BiomassC_CONUSTidalMarshes_gCm2.tif Source_Contribution: Dataset of the biomass carbon stock in coastal herbaceous wetlands. The first link is to the data release and the second link is to the specific dataset used. Downloaded in March 2024. Source_Information: Source_Citation: Citation_Information: Originator: U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geospatial Products Branch Publication_Date: 2023 Title: TIGER/Line Shapefile, 2020 Census Block Publication_Information: Publication_Place: Washington, D.C. Publisher: U.S. Census Bureau Online_Linkage: https://catalog.data.gov/dataset/tiger-line-shapefile-current-state-maryland-2020-census-block Online_Linkage: https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/USA_Census_Tracts/FeatureServer Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2023 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Census_Blocks.shp Source_Contribution: Census blocks. Downloaded in March 2024. Source_Information: Source_Citation: Citation_Information: Originator: National Park Service Publication_Date: 2024 Title: Annual Park Recreation Visits (1967-Last Calendar Year) Publication_Information: Publication_Place: Washington, D.C. Publisher: National Park Service Online_Linkage: https://irma.nps.gov/Stats/Reports/Park Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2024 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Annual_Visitation Source_Contribution: Number of visitors to HATU in 2023. Downloaded in August 2024. Source_Information: Source_Citation: Citation_Information: Originator: National Park Service, Cultural Resource GIS Facility Publication_Date: 20220125 Title: Cultural Resource District Polygon Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Washington, DC Publisher: National Park Service Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2022 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Cultural_1.shp Source_Contribution: This dataset was accessed and used by Dennis Skidds (NPS) to identify marsh units that are within 1 kilometer (km) of National Historic Sites and Cultural Landscapes. Source_Information: Source_Citation: Citation_Information: Originator: National Park Service, Cultural Resource GIS Facility Publication_Date: 20220125 Title: Cultural Resource Object Polygon Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Washington, DC Publisher: National Park Service Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2022 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Cultural_2.shp Source_Contribution: This dataset was accessed and used by Dennis Skidds (NPS) to identify marsh units that are within 1 km of National Historic Sites and Cultural Landscapes. Source_Information: Source_Citation: Citation_Information: Originator: National Park Service, Cultural Resource GIS Facility Publication_Date: 20220125 Title: Cultural Resource Site Polygon Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Washington, DC Publisher: National Park Service Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2022 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Cultural_3.shp Source_Contribution: This dataset was accessed and used by Dennis Skidds (NPS) to identify marsh units that are within 1 km of National Historic Sites and Cultural Landscapes. Source_Information: Source_Citation: Citation_Information: Originator: National Park Service, Cultural Resource GIS Facility Publication_Date: 20220125 Title: Cultural Resource Site Point Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Washington, DC Publisher: National Park Service Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2022 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Cultural_4.shp Source_Contribution: This dataset was accessed and used by Dennis Skidds (NPS) to identify marsh units that are within 1 km of National Historic Sites and Cultural Landscapes. Source_Information: Source_Citation: Citation_Information: Originator: National Park Service, Cultural Resource GIS Facility Publication_Date: 20220125 Title: Cultural Resource Site Line Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Washington, DC Publisher: National Park Service Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2022 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Cultural_5.shp Source_Contribution: This dataset was accessed and used by Dennis Skidds (NPS) to identify marsh units that are within 1 km of National Historic Sites and Cultural Landscapes. Source_Information: Source_Citation: Citation_Information: Originator: National Park Service Publication_Date: 2022 Title: NPS Unit Boundary-derived Areas of Analysis, Fall 2021 Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Washington, DC Publisher: NPS Natural Resources Inventory and Monitoring Division Online_Linkage: https://doi.org/10.57830/2287631 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2022 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: NPS_boundary.shp Source_Contribution: Used for delineation of park boundaries. Downloaded data in July 2022. Process_Step: Process_Description: All process steps were performed by either Kate Ackerman or Brian Andrews (contact information in this process step and the next), using ArcGIS Pro (ver.3.2.1). For simple operations the name of the geoprocessing tool used is given in capital letters; for complex operations, the name of the geoprocessing tool used is given in capital letters and any critical parameters used are given in parentheses, separated by a semicolon, immediately after the tool name. The input and output file names are provided in [square brackets] when necessary. Units for length and area calculations are meters (m) and square meters (m2) unless otherwise stated. Process_Date: 2025 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Kate Ackerman Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Country: US Contact_Voice_Telephone: 508-548-8700 x2331 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: kackerman@usgs.gov Process_Step: Process_Description: Export [mu_lifespan_CB.shp] to create a new shapefile [HATU_SDM_Metrics.shp], keeping the marsh units that are within and adjacent to the park boundary, and the fields that are needed for the SDM performance metrics: the marsh unit unique identification number (FID_CMU), the total area of the marsh unit (ATOT_M2), the area of the vegetated portion of the marsh unit (AVEG_M2), the lifespan under global mean sea-level rise of 0.5m and 1.0m by 2100 (GMSL05, GMSL10), the unvegetated to vegetated marsh ratio (UVVR), and the flag denoting anomalous marsh units (FLG). Project the shapefile from WGS 1984 Web Mercator Auxiliary Sphere to NAD 1983 (2011) UTM 18N. Source_Used_Citation_Abbreviation: mu_lifespan_CB.shp Process_Date: 2025 Source_Produced_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Brian Andrews Contact_Organization: U.S. Geological Survey Contact_Position: Geographer Contact_Address: Address_Type: mailing address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Country: US Contact_Voice_Telephone: 508-548-8700 x2348 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bandrews@usgs.gov Process_Step: Process_Description: Create attribute "Zstar" to calculate elevation relative to tidal range. Calculate the mean relative wetland elevation value relative to tidal range (Zstar (Z*)) within each marsh unit (FID_CMU). Zstar, the relative tidal elevation value, is a metric that normalizes elevation to the tidal amplitude at mean high water. Z* = (orthometric elevation - mean sea level) / (mean high water - mean sea level). Run ZONAL STATISTICS AS TABLE (feature zone data: [HATU_SDM_Metrics.shp], zone field: FID_CMU, value raster: [relative_tidal_elevation.tif], statistics type= Mean) to calculate the average Z* value for each marsh unit. In [HATU_SDM_Metrics.shp], add new attribute "Zstar" (Double) to attribute table and populate with results of zonal statistics (MEAN) by joining via the "FID_CMU" field. Assign a value of -9999 for marsh units that do not have Zstar data. Source_Used_Citation_Abbreviation: HATU_SDM_Metrics.shp Source_Used_Citation_Abbreviation: relative_tidal_elevation.tif Process_Date: 2025 Source_Produced_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Step: Process_Description: Create attribute “AMIG_M2” to assess the marsh migration potential of each marsh unit, calculated in terms of available migration area, under 2 feet of local sea-level rise, for each marsh unit. JOIN "AMIG_M2" from [mu_migration_CB.shp] to [HATU_SDM_Metrics.shp]. Source_Used_Citation_Abbreviation: HATU_SDM_Metrics.shp Source_Used_Citation_Abbreviation: mu_migration_CB.shp Process_Date: 2025 Source_Produced_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Step: Process_Description: Create attribute “NWIclass” to calculate the number of different coastal wetland (NWI subclasses) types found within a marsh unit. (1) Create a shapefile of the NWI classes that are used for the marsh unit analysis. From [NWI.shp] SELECT (ATTRIBUTE LIKE 'E2%EM%' OR ATTRIBUTE LIKE 'E2AB3%' OR ATTRIBUTE LIKE 'E2EM%' OR ATTRIBUTE LIKE 'E2SS%' OR ATTRIBUTE LIKE 'E2US4%'), EXPORT features to create [NWI_exclusive_select.shp]. Add an additional field that captures the first 5 digits of the NWI attribute field (no modifiers are retained). (2) PAIRWISE INTERSECT the NWI [NWI_exclusive_select.shp] and the marsh units [HATU_SDM_Metrics.shp] to assign NWI classes to each marsh unit. DISSOLVE the resulting shapefile (Dissolve field: FID_CMU, Concatenate) to obtain a list of all NWI classes found in each marsh unit. Calculate the number of different NWI subclasses found in each marsh unit. Source_Used_Citation_Abbreviation: HATU_SDM_Metrics.shp Source_Used_Citation_Abbreviation: NWI.shp Process_Date: 2025 Source_Produced_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Step: Process_Description: Create attribute "Ditchkmkm2" to calculate the density of ditches for each marsh unit. It is calculated by summing the linear length of ditches (km) divided by the area of each marsh unit (square kilometers). The final value for each marsh unit is ditching intensity (linear kilometers of ditch per square kilometer of marsh unit area). PAIRWISE INTERSECT the ditches [NortheastUSDitches_Polyline.shp] and marsh units [HATU_SDM_Metrics.shp] then SUMMARIZE ATTRIBUTES by FID_CMU to get total length of ditches in each marsh unit. Calculate the ditch density (km/km2): total length of ditches (km) in a marsh, divided by the total marsh unit area (km2). Source_Used_Citation_Abbreviation: HATU_SDM_Metrics.shp Source_Used_Citation_Abbreviation: NortheastUSDitches_Polyline.shp Process_Date: 2025 Source_Produced_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Step: Process_Description: Create attribute "BioDiv" that provides information on the biodiversity of the marsh unit, which is the summation of the "BCN" (whether the marsh unit intersects ecologically important land (classified as Tier 1-5 in the Biodiversity Conservation Network)) and the "SAV" (whether the marsh unit is within 100m of seagrass beds) attributes. BCN: SELECT BY LOCATION (intersect) [BioNet] and [HATU_SDM_Metrics.shp] to identify marsh units that intersect land classified as Tier 1-5 in the Biodiversity Conservation Network. If they intersect, the marsh unit is assigned a value of 1 for the “BCN” attribute. SAV: SELECT BY LOCATION (intersect, 100 m) [SAV.shp] and [HATU_SDM_Metrics.shp] to identify marsh units that have seagrass within 100 m of the marsh unit. If seagrass beds are within 100 m of the marsh unit, the marsh unit is assigned a value of 1 for the “SAV” attribute. BioDiv: The “BioDiv” attribute is the sum of the “BCN” and “SAV” attributes. Source_Used_Citation_Abbreviation: HATU_SDM_Metrics.shp Source_Used_Citation_Abbreviation: BioNet Source_Used_Citation_Abbreviation: SAV Process_Date: 2025 Source_Produced_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Step: Process_Description: Create attribute “Quantl” to compare the size of marsh units across the Park. Based on the total marsh unit area, the marsh units are binned into 5 equal area bins. Each marsh unit is placed into a bin based on its size (bin 1 contains the smallest marsh units; bin 5 contains the largest marsh units). Calculate the total area of all marsh units, sort marsh units by size, divide the dataset into five approximately equal parts based on area. The smallest marsh units will have a Quantl value of 1, the largest marsh units will have a Quantl value of 5. Source_Used_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Date: 2025 Source_Produced_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Step: Process_Description: Create attribute "AssetScore" to estimate the protection a marsh unit provides to an asset (building). The Asset Score is calculated by dividing the maximum Coastal Change Likelihood (USGS_CCL_MaximumCCL_2022.tif) score within 100 m of an asset by the distance in meters (binned) from the asset to the marsh unit. The Asset Score ranges from 0 (minimal protection provided by marsh unit) to 10 (maximal protection). 1)PROJECT source shapefiles from WGS 1984 Web Mercator coordinate system to NAD 83 (2011) UTM 18N and output as feature classes within a geodatabase to ensure distance calculations are accurate. Source files: marsh units: [HATU_SDM_Metrics]; buildings: [HATU_Features]; output: [HATU_BuildingFeatures_UTM18]. 2)Calculate the maximum CCL value within 100 m of each of the assets (buildings) within HATU boundary. BUFFER [HATU_BuildingFeatures_UTM18] by 100 m, output= [HATU_BID100mBuff]. ZONAL STATISTICS AS TABLE (Input: [HATU_BID100mBuff]; zone field=BID; Input Value Raster: [USGS_CCL_2022.tif]; Output table: [HATU_BuildingMaxCCL_100m]; Statistics Type=Maximum). 3)Calculate the distance in meters from the buildings [HATUBuildingFeatures_UTM18] to the closest point along the boundary of all marsh units [HATU_SDM_Metrics] that are within 1 km of each feature in [HATUBuildingFeatures_UTM18]. GENERATE NEAR TABLE (Output table: [HATU_BuildingsNearMU_1km]). Only need to retain the fields "IN_FID", "NEAR_FID", and "NEAR_DIST" from the output table. 4)Join (JOIN FIELD) the MAX CCL value from table [HATU_BuildingMaxCCL_100m] (join field=BID) to the output table [HATU_BuildingsNearMU_1km] (join field=IN_FID; Transfer Fields=MAX). 5)ADD FIELDS (multiple) (Input Table: [HATU_SDM_Metrics]; Field Names: "Dist" (Short) and "AssetScore" (Double)). 6)ADD JOIN (Join one to many) (Input Table: [HATU_SDM_Metrics]; input field=OBJECTID; Join Table: [HATU_BuildingsNearMU_1km]; Join Field: NEAR_FID; transfer all fields). EXPORT joined feature class to [HATU_SDM_Metrics_AS]. 7) Calculate the "AssetScore" field in 2 steps. In [HATU_SDM_Metrics_AS], first CALCULATE FIELD "Dist" by rounding up the "NEAR_DIST" value (Data type=double from step 3 and 6) in meters to the nearest 100, then dividing the rounded number by 100. For example, a "NEAR_DIST" value of 23.55 m rounds to 100, then divided by 100 gives a “Dist” value of 1; a "NEAR_DIST" of 176.16 m gives "Dist" value of 2. Second, CALCULATE FIELD "AssetScore" by dividing "MAX" (max CCL) by "DIST." 8)Run PAIRWISE DISSOLVE (input file: [HATU_SDM_Metrics_AS]; Dissolve field: FID_CMU; Statistics field: AssetScore; Statistics Type: Maximum; Output: [HATU_SDM_Metrics_AS_Dissolve]) to dissolve duplicate "FID CMU" records from the one-to-many join in step 6. This final step retains the maximum "AssetScore" for any one-to-many relationships between each marsh unit and building pair(s). The output dissolved feature class does not retain all the fields from the source [HATU_SDM_Metrics_AS] and only retains "FID_CMU" and "MAX_AssetScore." 9)JOIN FIELD "MAX_AssetScore" from [HATU_SDM_Metrics_AS] back into original source [HATU_SDM_Metrics.shp] using the "FID_CMU" field. Source_Used_Citation_Abbreviation: HATU_SDM_Metrics.shp Source_Used_Citation_Abbreviation: HATU_Features Source_Used_Citation_Abbreviation: USGS_CCL_MaximumCCL_2022.tif Process_Date: 2025 Source_Produced_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Step: Process_Description: Create attribute “VegMU_MgC” to summarize the amount of biomass carbon in the vegetated part of the marsh unit. Extract the vegetated portion of the marsh unit polygons. SELECT BY ATTRIBUTES from [CMU_CB] that are within and adjacent to the park boundary [NPS_boundary.shp] where "TYP"= 'vegetated'; output: [CMU_HATU_VEG.shp]. PROJECT [CMU_HATU_VEG.shp] to Albers_Conical_Equal_Area to match the projection of the biomass carbon file. Run ZONAL STATISTICS AS TABLE (feature zone data: [CMU_HATU_VEG.shp], zone field: FID_CMU, value raster: [BiomassC_CONUSTidalMarshes_gCm2.tif], Statistics type=Mean) to get the average biomass carbon for the vegetated portion of the marsh unit. JOIN the MEAN value to [CMU_HATU_VEG.shp]. Multiply MEAN by the vegetated area of the marsh unit to get total grams of carbon in the vegetated portion of the marsh unit. Report the value in megagrams of carbon (MgC). Assign a value of -9999 for marsh units that do not have carbon data. Source_Used_Citation_Abbreviation: HATU_SDM_Metrics.shp Source_Used_Citation_Abbreviation: CMU_CB Source_Used_Citation_Abbreviation: NPS_boundary.shp Source_Used_Citation_Abbreviation: BiomassC_CONUSTidalMarshes_gCm2.tif Process_Date: 2025 Source_Produced_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Step: Process_Description: Create new attribute “Pop” to calculate the total population within 50 miles of the marsh units. The population value is the same for all marsh units. SELECT BY LOCATION (intersect, 50 miles) [Census_Blocks.shp] and [HATU_SDM_Metrics.shp]. Calculate total population in the selected census blocks. Source_Used_Citation_Abbreviation: HATU_SDM_Metrics.shp Source_Used_Citation_Abbreviation: Census_Blocks.shp Process_Date: 2025 Source_Produced_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Step: Process_Description: Create new attribute “Visit” that is the total number of visitors to the park in 2023. This value is the same for all marsh units. The number of visitors to HATU in 2023 was obtained from [Annual_Visitation]. Source_Used_Citation_Abbreviation: HATU_SDM_Metrics.shp Source_Used_Citation_Abbreviation: Annual_Visitation Process_Date: 2025 Source_Produced_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Step: Process_Description: Create 3 attributes “NHS,” “CL,” and “NHS_CL” to identify marshes that are close to cultural and historical resources. "NHS" identifies marsh units that are within 1 km of a historic site (National Historic Site (NHS), National Register of Historic Places (NRHP)), "CL" identifies marsh units that are within 1 km of a Cultural Landscape (CL). The attribute "NHS_CL" indicates marsh unit that are within 1 km of either an NHS or CL site or both (value of 1 or 2, respectively). Dennis Skidds (NPS) aggregated the park-restricted data to determine whether a marsh unit is within 1 km of the cultural and historical resources. Source_Used_Citation_Abbreviation: HATU_SDM_Metrics.shp Source_Used_Citation_Abbreviation: Cultural_1.shp Source_Used_Citation_Abbreviation: Cultural_2.shp Source_Used_Citation_Abbreviation: Cultural_3.shp Source_Used_Citation_Abbreviation: Cultural_4.shp Source_Used_Citation_Abbreviation: Cultural_5.shp Process_Date: 2024 Source_Produced_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Dennis Skidds Contact_Organization: National Park Service Contact_Position: Regional GIS Program Manager Contact_Address: Address_Type: mailing and physical address Address: 1 Greenhouse Rd City: Kingston State_or_Province: RI Postal_Code: 02881 Country: US Contact_Voice_Telephone: 401-374-4994 Contact_Electronic_Mail_Address: dennis_skidds@nps.gov Process_Step: Process_Description: Create an attribute "InOutPark" to denote whether a marsh unit is inside or outside of the park boundary. SELECT BY LOCATION (intersect) [NPS_boundary.shp] and [HATU_SDM_Metrics.shp] to identify whether the marsh unit is inside or outside of the park boundary. Source_Used_Citation_Abbreviation: HATU_SDM_Metrics.shp Source_Used_Citation_Abbreviation: NPS_boundary.shp Process_Date: 2025 Source_Produced_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Step: Process_Description: PROJECT (Output coordinate system=WGS 1984 Web Mercator Auxiliary Sphere) [HATU_SDM_Metrics.shp] to Web Mercator. Source_Used_Citation_Abbreviation: HATU_SDM_Metrics.shp Process_Date: 2025 Source_Produced_Citation_Abbreviation: HATU_SDM_Metrics.shp Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 718 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: WGS 1984 Web Mercator Auxiliary Sphere (ESRI Full Name: WGS_1984_Web_Mercator_Auxiliary_Sphere) Mercator: Standard_Parallel: 0.0 Longitude_of_Central_Meridian: 0.0 False_Easting: 0.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.6096 Ordinate_Resolution: 0.6096 Planar_Distance_Units: Meter Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.25722 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: HATU_SDM_Metrics.shp Entity_Type_Definition: Attribute information associated with marsh units of HATU salt marsh complex. Entity_Type_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the feature type. Attribute: Attribute_Label: FID_CMU Attribute_Definition: Sequential unique whole number that represents the identification number for each conceptual marsh unit. This attribute was carried over from the original source, mu_lifespan_CB.shp. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 994 Range_Domain_Maximum: 7102 Attribute_Units_of_Measure: none Attribute: Attribute_Label: ATOT_M2 Attribute_Definition: Total surface area of a marsh unit in square meters. This attribute was carried over from the original source, mu_lifespan_CB.shp. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 143.305 Range_Domain_Maximum: 708852.830 Attribute_Units_of_Measure: square meters Attribute: Attribute_Label: AVEG_M2 Attribute_Definition: Surface area of vegetated part of a marsh unit in square meters. This attribute was carried over from the original source, mu_lifespan_CB.shp. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 644588.490 Attribute_Units_of_Measure: square meters Attribute: Attribute_Label: GMSL05 Attribute_Definition: Lifespan for a marsh unit (in years) for global mean sea-level rise of 0.5 m by 2100. Negative lifespan values (other than No Data) indicates the estimated lifespan is depleted and loss is imminent. A value of 10,000 indicates a lifespan equal to or greater than 10,000. A value of -9999 indicates no data. This attribute was carried over from the original source, mu_lifespan_CB.shp. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -9 Range_Domain_Maximum: 10000 Attribute_Units_of_Measure: years Attribute: Attribute_Label: GMSL10 Attribute_Definition: Lifespan for a marsh unit (in years) for global mean sea-level rise of 1.0 m by 2100. Negative lifespan values(other than No Data) indicates the estimated lifespan is depleted and loss is imminent. A value of 10,000 indicates a lifespan equal to or greater than 10,000. A value of -9999 indicates no data. This attribute was carried over from the original source, mu_lifespan_CB.shp. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -7 Range_Domain_Maximum: 10000 Attribute_Units_of_Measure: years Attribute: Attribute_Label: UVVR Attribute_Definition: Ratio of unvegetated surface area to vegetated surface area. Ordinarily, UVVR ranges from zero (completely vegetated) to infinity (completely unvegetated). However, it is assigned the value of -1 when completely unvegetated. Note that there can be very large values of UVVR (indicating that the marsh unit is mostly unvegetated). This attribute was carried over from the original source, mu_lifespan_CB.shp. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -1 Range_Domain_Maximum: 714.173 Attribute_Units_of_Measure: none Attribute: Attribute_Label: Zstar Attribute_Definition: Mean wetland elevation above mean sea level relative to the tidal range of the marsh unit. A value of -9999 indicates no data. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -2.509 Range_Domain_Maximum: 4.259 Attribute_Units_of_Measure: unitless Attribute: Attribute_Label: AMIG_M2 Attribute_Definition: Potential marsh migration area in square meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 9531421.451 Attribute_Units_of_Measure: square meters Attribute: Attribute_Label: NWIclass Attribute_Definition: Number of NWI subclasses in a marsh unit. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 3 Attribute_Units_of_Measure: None Attribute: Attribute_Label: Ditchkmkm2 Attribute_Definition: Ditching intensity (linear kilometers of ditch per square kilometer of marsh unit area). Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 16.324 Attribute_Units_of_Measure: kilometers per square kilometer Attribute: Attribute_Label: BCN Attribute_Definition: Presence (1) or absence (0) of land that is significant for biodiversity conservation (Biodiversity Conservation Network Tier 1-5) within a marsh unit. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Presence of land that is significant for biodiversity conservation. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: Absence of land that is significant for biodiversity conservation. Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: SAV Attribute_Definition: Presence (1) or absence (0) of submerged aquatic vegetation (SAV) within 100m of a marsh unit. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Presence of SAV within 100m of a marsh unit. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: Absence of SAV within 100m of a marsh unit. Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: BioDiv Attribute_Definition: The sum of attributes BCN and SAV to indicate whether a marsh unit has land that is significant for biodiversity conservation within the marsh unit, or SAV adjacent to the marsh unit. If both conservation land and SAV are present, the value is 2; if only one is present, the value is 1; if neither are present, the value is 0. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2 Enumerated_Domain_Value_Definition: Presence of biodiversity conservation land within the marsh unit, and SAV adjacent to the marsh unit. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Presence of biodiversity conservation land within the marsh unit, or SAV adjacent to the marsh unit. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: Absence of biodiversity conservation land within the marsh unit, nor SAV adjacent to the marsh unit. Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: Quantl Attribute_Definition: The quantile bin that a marsh unit is assigned to based on its area. The marsh units with the smallest areas are in quantile 1, and the largest marsh units are in quantile 5. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 5 Attribute_Units_of_Measure: None Attribute: Attribute_Label: AssetScore Attribute_Definition: An estimate of the protection a marsh unit provides to an asset (building). The asset score ranges from 0 (minimal protection provided by marsh unit) to 10 (maximal protection). Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 2.66 Attribute_Units_of_Measure: None Attribute: Attribute_Label: VegMU_MgC Attribute_Definition: Total biomass carbon in the vegetated portion of the marsh unit. A value of -9999 indicates no data. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.529 Range_Domain_Maximum: 691.318 Attribute_Units_of_Measure: megagrams carbon Attribute: Attribute_Label: Pop Attribute_Definition: The total population within 50 miles of the park boundary. This value is the same for all marsh units. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 3,294,403 Enumerated_Domain_Value_Definition: Total population within 50 miles of the park boundary. Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: Visit Attribute_Definition: The total number of visitors to HATU in 2023. This value is the same for all marsh units. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 11,446 Enumerated_Domain_Value_Definition: Total number of visitors to HATU in 2023. Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: NHS Attribute_Definition: Marsh units that are within 1 km of a National Historic Site (NHS, NRHP) have a value of 1, otherwise they have a value of 0. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Marsh unit is within 1 km of a National Historic Site. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: Marsh unit is not within 1 km of a National Historic Site. Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: CL Attribute_Definition: Marsh units that are within 1 km of a Cultural Landscape have a value of 1, otherwise they have a value of 0. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Marsh unit is within 1 km of a Cultural Landscape. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: Marsh unit is not within 1 km of a Cultural Landscape. Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: NHS_CL Attribute_Definition: Marsh unit that are within 1 km of either an NHS or CL site or both have a value of 1 or 2, respectively, otherwise they have a value of 0. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2 Enumerated_Domain_Value_Definition: Marsh unit is within 1 km of a NHS and a CL site. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Marsh unit is within 1 km of a NHS or a CL site. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: Marsh unit is not within 1 km of a NHS nor a CL site. Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: FLG Attribute_Definition: Marsh unit flag indicating anomalous marsh units based on absence of vegetation, elevation, surface area and tidal range extrapolation. FLG values indicate: (-1) no vegetated area in the marsh unit; (-10) marsh unit elevation higher than the 99.8 percentile; (-100) marsh unit elevation less than the 0.2 percentile; (-200) greater than 25 percent of the marsh unit elevation is hydro-flattened; (-1000) marsh unit surface area less than 900 m2; (-10000) mean tidal range of marsh unit is extrapolated; and (0) no flag. Combination of negative values indicates a combination of flags. For example, -1001 indicates no vegetated area and area less than 900 m2.This attribute was carried over from the original source, mu_lifespan_CB.shp. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -11201 Range_Domain_Maximum: 0 Attribute_Units_of_Measure: None Attribute: Attribute_Label: InOutPark Attribute_Definition: Classification of marsh unit as either inside or outside of the park boundary. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: in Enumerated_Domain_Value_Definition: Marsh unit that is inside the park boundary. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: out Enumerated_Domain_Value_Definition: Marsh unit that is outside the park boundar.y Enumerated_Domain_Value_Definition_Source: USGS Overview_Description: Entity_and_Attribute_Overview: In this dataset, metrics are calculated for marsh units of Harriet Tubman Underground Railroad National Historical Park (HATU) to be used in an SDM framework to prioritize management actions. All attributes, as well as attribute definitions, are included even if they are not present in any of the marsh units in the park. This is to ensure consistency across parks and recognition that the attribute is not present rather than unaccounted for. Entity_and_Attribute_Detail_Citation: USGS Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - ScienceBase Contact_Address: Address_Type: mailing and physical address Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: HATU_SDM_Metrics.zip (ZIP file contains the shapefile HATU_SDM_Metrics.shp and the additional shapefile components and FGDC CSDGM metadata in xml format), and a browse graphic (HATU_SaltMarsh_Browse.png). Distribution_Liability: Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Shapefile Format_Version_Number: Esri ArcGIS Pro 3.2.1 Format_Information_Content: This zipped file contains a polygon shapefile and its components, and metadata in xml format. Transfer_Size: 2.5 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/68a629c3d4be021c47116427 Network_Resource_Name: https://www.sciencebase.gov/catalog/item/68a629c3d4be021c47116427 Access_Instructions: The first link in network resources is to download data directly. The second link points to a landing page with metadata and data. Digital_Form: Digital_Transfer_Information: Format_Name: WMS Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalogMaps/mapping/ows/68a629c3d4be021c47116427?service=wms&request=getcapabilities&version=1.3.0 Access_Instructions: The link in network resources points to the Web Mapping Services (WMS) end point. Digital_Form: Digital_Transfer_Information: Format_Name: WFS Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalogMaps/mapping/ows/68a629c3d4be021c47116427?service=wfs&request=getcapabilities&version=1.0.0 Access_Instructions: The link in network resources points to the Web Feature Service (WFS) end point. Fees: None. No fees are applicable for obtaining the data set. Metadata_Reference_Information: Metadata_Date: 20251211 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Kate Ackerman Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Contact_Voice_Telephone: 508-548-8700 x2331 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov Contact_Instructions: The metadata contact email address is a generic address in the event the person is no longer with USGS. Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998