Metadata: Identification_Information: Citation: Citation_Information: Originator: Zafer Defne Originator: Neil K. Ganju Publication_Date: 2018 Title: Unvegetated to vegetated marsh ratio in Plum Island Estuary and Parker River salt marsh complex, Massachusetts Edition: 1.0 Geospatial_Data_Presentation_Form: Vector Digital Data Set (Polygon) Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9OW6LFU Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Defne, Z., and Ganju, N.K., 2018, Unvegetated to vegetated marsh ratio in Plum Island Estuary and Parker River salt marsh complex, Massachusetts: U.S. Geological Survey data release, https://doi.org/P9OW6LFU Online_Linkage: https://doi.org/10.5066/P9OW6LFU Description: Abstract: Unvegetated to vegetated marsh ratio (UVVR) in the Plum Island Estuary and Parker River (PIEPR) salt marsh complex was computed based on conceptual marsh units defined by Defne and Ganju (2018). UVVR was calculated based on U.S. Department of Agriculture National Agriculture Imagery Program (NAIP) 1-meter resolution imagery. Through scientific efforts initiated with the Hurricane Sandy Science Plan, the U.S. Geological Survey has been expanding national assessment of coastal change hazards and forecast products to coastal wetlands, including the Plum Island Estuary and Parker River salt marsh complex, with the intent of providing Federal, State, and local managers with tools to estimate the vulnerability and ecosystem service potential of these wetlands. For this purpose, the response and resilience of coastal wetlands to physical factors need to be assessed in terms of the ensuing change to their vulnerability and ecosystem services. UVVR is planned to be an underlying parameter in the synthesis of these factors. References: Defne, Z., and Ganju, N.K., 2018, Conceptual marsh units for Plum Island Estuary and Parker River salt marsh complex, Massachusetts: U.S. Geological Survey data release, https://doi.org/10.5066/P9XF54QF Purpose: The purpose of this shapefile is to calculate ratio of unvegetated area to vegetated area in each marsh unit. Analysis of UVVR is planned to be a part of a comprehensive assessment to identify the factors and their weights in determining the vulnerability and resiliency of salt marshes. An unvegetated area to vegetated area ratio was defined as a potential indicator of current state of a salt marsh unit. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2018 Currentness_Reference: Publication date. Vegetated and unvegetated polygons were created based on the National Agriculture Imagery Program (NAIP) imagery acquired in 2014. Status: Progress: Complete Maintenance_and_Update_Frequency: None Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -70.928234635 East_Bounding_Coordinate: -70.768945223 North_Bounding_Coordinate: 42.843340605 South_Bounding_Coordinate: 42.679945448 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:5b622a13e4b006a11f6f84c5 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: Theme_Keyword_Thesaurus: None Theme_Keyword: salt marsh Theme_Keyword: vegetation Theme_Keyword: marsh health Theme_Keyword: estuary Theme_Keyword: Long-Term Ecological Research Theme_Keyword: LTER Theme_Keyword: UVVR Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: inlandWaters Theme_Keyword: environment Place: Place_Keyword_Thesaurus: None Place_Keyword: Parker River National Wildlife Refuge Place_Keyword: Parker River/Essex Bay Area of Critical Environmental Concern Place_Keyword: Great Marsh Area of Critical Environmental Concern Place_Keyword: United States Place_Keyword: Atlantic Ocean Place_Keyword: Plum Island Sound Place_Keyword: Parker River Place_Keyword: Merrimack River Place_Keyword: Sandy Point State Reservation Place_Keyword: Massachusetts Access_Constraints: None Use_Constraints: The unvegetated to vegetated ratio for 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. 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 source of this information. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Zafer Defne Contact_Position: Ocean Scientist 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 x2254 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: zdefne@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/5b622a13e4b006a11f6f84c5?name=mu_UVVR_PIEPRp.png Browse_Graphic_File_Description: Graphic that shows UVVR in marsh units of PIEPR salt marsh complex overlaying Esri basemap. 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 10.5.1 (Build 7333) Service Pack N/A (Build N/A) Cross_Reference: Citation_Information: Originator: Zafer Defne Originator: Neil K. Ganju Publication_Date: 2018 Title: Conceptual marsh units for Plum Island Estuary and Parker River salt marsh complex, Massachusetts Edition: 1.0 Geospatial_Data_Presentation_Form: Vector Digital Data Set (Polygon) Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9XF54QF Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9XF54QF Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Marsh units, water and land boundary inherit their accuracy from accuracy of the source data, PIEPR marsh units. Vegetated and unvegetated polygons accuracy is based on the 1-meter resolution National Agriculture Imagery Program (NAIP) imagery acquired in 2014, U.S. Geological Survey National Elevation Data (USGS NED) collected in 2011 and U.S. Department of Agriculture Digital Elevation Model (USDA DEM) with a processing date of 2016. Logical_Consistency_Report: Topological errors that occurred during geoprocessing were automatically removed by the topological rules used for the analysis. The polygons are checked for correct geometry and do not overlap. Small polygons (less than 9 square meters) were assumed to be marginal and were assigned the classification from the surrounding majority value. A visual comparison between NAIP imagery was performed at randomly selected sites to verify the land and water boundaries. Marsh polygons without any vegetation were assigned a UVVR value of -1. Completeness_Report: The results are specific to the marsh polygons definition within the boundaries of the PIEPR 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 that delineates the marsh units, and can be considered to be +/-6 meters. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Department of Agriculture Natural Resources Conservation Service Soils (USDA NRCS) - National Geospatial Center of Excellence Publication_Date: 20110215 Title: LiDAR Elevation Dataset - Bare Earth DEM - 1 Meter Geospatial_Data_Presentation_Form: Raster Digital Data Set Publication_Information: Publication_Place: Fort Worth, TX Publisher: U.S. Department of Agriculture Other_Citation_Details: The following 1-meter DEM files were used in analyses: >1) lidar01m42070g8.tif >2) lidar01m42070g7.tif >3) lidar01m42070f7.tif Online_Linkage: https://gdg.sc.egov.usda.gov/ Online_Linkage: https://gdg.sc.egov.usda.gov/GDGHome_DirectDownLoad.aspx Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2012 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: USDA DEM Source_Contribution: Elevation data from USDA 1-meter DEM were used in analyses. Projection was NAD 1983 UTM Zone 19N with the North American Vertical Datum of 1988 (NAVD 88). Download date was 2017/09/01. Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2012 Title: USGS National Elevation Dataset (NED) 1/9 arc-second Geospatial_Data_Presentation_Form: Raster Digital Data Set Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: The following USGS NED ned19 tiles were used in analyses: >1) USGS NED ned19_n43x00_w071x00_ma_lftne_lot7_2011 1/9 arc-second 2012 15 x 15 minute IMG >2) USGS NED ned19_n42x75_w071x00_ma_lftne_lot7_2011 1/9 arc-second 2012 15 x 15 minute IMG Online_Linkage: https://ned.usgs.gov/ Online_Linkage: https://nationalmap.gov/viewer.html Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2012 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: NED Source_Contribution: Elevation data from USGS NED ned19 tiles were used in analyses. Projection was NAD 1983 UTM Zone 19N with the North American Vertical Datum of 1988 (NAVD 88). Download date was 2017/09/01. Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2014 Title: National Agriculture Imagery Program (NAIP) Imagery 3.75 x 3.75 minute JPEG2000 from The National Map Geospatial_Data_Presentation_Form: Remote-sensing image Publication_Information: Publication_Place: Salt Lake City, Utah Publisher: USDA-FSA-APFO Aerial Photography Field Office Other_Citation_Details: The following NAIP Imagery tiles were used in analyses: >1) NAIP Imagery m_4207010_sw_19_1_20140712_20140923 3.75 x 3.75 minute JPEG2000 from The National Map >2) NAIP Imagery m_4207018_nw_19_1_20140712_20140923 3.75 x 3.75 minute JPEG2000 from The National Map >3) NAIP Imagery m_4207017_ne_19_1_20140712_20140923 3.75 x 3.75 minute JPEG2000 from The National Map >4) NAIP Imagery m_4207009_se_19_1_20140712_20140923 3.75 x 3.75 minute JPEG2000 from The National Map >5) NAIP Imagery m_4207018_ne_19_1_20140712_20140923 3.75 x 3.75 minute JPEG2000 from The National Map >6) NAIP Imagery m_4207010_se_19_1_20140712_20140923 3.75 x 3.75 minute JPEG2000 from The National Map >7) NAIP Imagery m_4207010_nw_19_1_20140712_20140923 3.75 x 3.75 minute JPEG2000 from The National Map >8) NAIP Imagery m_4207010_nw_19_1_20140712_20141007 3.75 x 3.75 minute JPEG2000 from The National Map >9) NAIP Imagery m_4207009_ne_19_1_20140712_20140923 3.75 x 3.75 minute JPEG2000 from The National Map >10) NAIP Imagery m_4207010_ne_19_1_20140712_20140923 3.75 x 3.75 minute JPEG2000 from The National Map >11) NAIP Imagery m_4207018_sw_19_1_20140712_20140923 3.75 x 3.75 minute JPEG2000 from The National Map >12) NAIP Imagery m_4207017_se_19_1_20140712_20140923 3.75 x 3.75 minute JPEG2000 from The National Map >13) NAIP Imagery m_4207018_se_19_1_20140712_20140923 3.75 x 3.75 minute JPEG2000 from The National Map Online_Linkage: https://nationalmap.gov/viewer.html Online_Linkage: https://www.sciencebase.gov/catalog/item/51355312e4b0e1603e4fed62 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2014 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: NAIP Source_Contribution: Downloaded NAIP 1-meter resolution imagery from the USGS National Map. Projection was WGS 1984 Web Mercator Auxiliary Sphere. Download date was 2017/08/01. Source_Information: Source_Citation: Citation_Information: Originator: Zafer Defne Originator: Neil K. Ganju Publication_Date: 2018 Title: Conceptual marsh units for Plum Island Estuary and Parker River salt marsh complex, Massachusetts Geospatial_Data_Presentation_Form: Vector Digital Data Set (Polygon) Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9XF54QF Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9XF54QF 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: CMU_PIEPRp.shp Source_Contribution: Used the features in [CMU_PIEPRp.shp] to calculate the mean elevation for each marsh unit. Projection was WGS 1984 Web Mercator Auxiliary Sphere. Source_Information: Source_Citation: Citation_Information: Originator: U.S. Fish and Wildlife Service Publication_Date: 2017 Title: National Wetland Inventory Massachusetts Wetlands Geospatial_Data_Presentation_Form: Vector Digital Data Set (Polygon) Publication_Information: Publication_Place: Madison, WI 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: 2017 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: NWI Source_Contribution: Downloaded wetlands data for the state of Massachusetts in Shapefile format from the NWI download page. Projection was NAD 1983 Albers. Download date was 2017/08/01. Process_Step: Process_Description: This process step and all subsequent process steps were performed by the same person, Zafer Defne, in ArcMap (ver. 10.5.1) using tools from ArcToolbox, unless otherwise stated. For complex operations, names of specific tools used are given in CAPITAL letters (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. Set the data frame coordinate system and projection to NAD 1983 UTM Zone 19N. Prepare elevation dataset to be clipped to the boundaries polygon. MOSAIC TO NEW RASTER(Pixel type= 32 bit float; Mosaic operator=Mean; Cellsize=1 m) all of the USGS NED tiles and USDA DEM raster to a new raster dataset with 1 m resolution [elev_mosaic.tif]. Resolution is increased from 3 m to 1 m to have a finer representation of the polygon boundaries in the horizontal during this step. Source_Used_Citation_Abbreviation: USDA DEM Source_Used_Citation_Abbreviation: NED Process_Date: 2018 Source_Produced_Citation_Abbreviation: elev_mosaic Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Zafer Defne Contact_Position: Ocean Scientist 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 x2254 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: zdefne@usgs.gov Process_Step: Process_Description: Prepare mask polygon to define analysis boundaries. In order to account for the possible influence of the surrounding terrain on the analysis, first a mask area larger than the salt marsh extent is created [UVVR_mask]. At the end of the analysis the results are clipped to the boundaries of the salt marsh area [MU_mask]. Both UVVR_mask and MU_mask are edited to decide which interior polygons are removed. a) EXPORT features from NWI dataset after SELECT("ATTRIBUTE" LIKE 'E2%EM%' OR "ATTRIBUTE" LIKE 'E2AB3%' OR "ATTRIBUTE" LIKE 'E2EM%' OR "ATTRIBUTE" LIKE 'E2SS%' OR "ATTRIBUTE" LIKE 'E2US4%') to select from estuarine intertidal areas of 1) Emergent, 2) Scrub-shrub, 3) Rooted vascular aquatic bed, 4) Organic unconsolidated shore classes [NWI_exclusive_select.shp]. b) BUFFER(Input features=[NWI_exclusive_select.shp]; Linear unit=5 meters; Dissolve type=All) to obtain the mask polygon [buff5m.shp] and ELIMINATE POLYGON PART(Condition=Percentage; Percentage=99; Eliminate contained part only) to obtain [UVVR_mask01.shp]. Apply buffer with -5 meters to obtain [MU_mask01.shp]. c) EXPORT features from NWI dataset after SELECT("ATTRIBUTE" NOT LIKE 'E%' OR "ATTRIBUTE" LIKE '%FO')to obtain features that are not estuarine or are forested estuarine. MULTIPART TO SINGLEPART to separate individual polygons [NWI_inclusive_single.shp]. d)To exclude the voids in the NWI map during the analysis these interior polygons need to be removed from the mask. Create a rectangular polygon that covers the domain [extent.shp]. ERASE [NWI_excusive_select.shp] from [extent.shp] and MULTIPART TO SINGLEPART to get [NWI_voids_single.shp]. e) SELECT BY LOCATION from [NWI_inclusive_single.shp] that are completely within the [MU_mask01.shp], and SELECT BY LOCATION from [NWI_voids_single.shp] that are completely within the [MU_mask01.shp]. If any of additional polygons need to be removed from the mask include them in a new feature layer [erase_mask_manual.shp]. Merge all three feature sets to get polygons to be excluded [erase_inside.shp] from the final masks. f) ERASE [erase_inside.shp] from [MU_mask01.shp] and [UVVR_mask01.shp] to obtain [MU_mask.shp] and [UVVR_mask.shp], respectively. Source_Used_Citation_Abbreviation: NWI Process_Date: 2018 Source_Produced_Citation_Abbreviation: UVVR_mask Process_Step: Process_Description: Compute vegetated and unvegetated boundaries by image processing. a) EXTRACT BY MASK from elevation raster [elev_mosaic.tif] using [UVVR_mask.shp] polygon. Rescale the elevation raster values to the same range with 8-bit NAIP imagery (0 to 255) using min-max scaling. Perform ISO CLUSTER UNSUPERVISED CLASSIFICATION with4-bands (Near Infra Red , Blue, Green, Red from the NAIP imagery and the rescaled elevation raster with 32 classes a minimum class size of 5000 cells. RECLASSIFY the classified raster by visually comparing the NAIP imagery to obtain the unvegetated-vegetated raster [UVVc.tif]. b) Dissolve unvegetated regions smaller than a threshold value to the surrounding vegetated regions and vice versa to clean the UVV raster. For this purpose use the REGION(Number of neighbors=4; Zone grouping method=Within; Add Link field to output) to get the [UVV_region.tif], and TEST("Count" less than 9) to set a threshold value of 9 raster cells [UVV_test.tif]. Use RASTER CALCULATOR to toggle the value of the Link field in the region raster, where the test raster indicates regions with areas smaller than the threshold. c) RASTER TO POLYGON(Simplify polygons=False) and CLIP with the final marsh complex outline [mu_diss.shp] to obtain [UVVc_filt_clip.shp]. d) REPAIR GEOMETRY and DISSOLVE(Create multipart features=False) to get filtered, clipped and dissolved unvegetated-vegetated polygons [UVVc_filt_clip_diss.shp]. e) INTERSECT the dissolved conceptual marsh units [mu_diss.shp] with unvegetated-vegetated polygons [UVVc_filt_clip.shp], REPAIR GEOMETRY, and calculate the area of unvegetated and vegetated polygons in each marsh unit. To do this ADD GEOMETRY ATTRIBUTES(Geometry properties=Area_geodesic; Area unit=Square_meters) to get [UVV_poly.shp], and DISSOLVE(Input features=UVV_poly.shp; Dissolve fields=FID_CMU, gridcode; Statistics field=gridcode.MEAN, Area_geo.SUM) and REPAIR GEOMETRY to get [UVV_poly_diss.shp]. Edit the fields to have "TYP", "APGN_M2", and "ATOT_M2" fields for type of polygon indicating vegetated or unvegetated, surface area of the polygon, and total surface area of the marsh unit, respectively. f) Add field "UVVR" and calculate unvegetated to vegetated ratio based on "TYP", "APGN_M2" and "ATOT_M2" fields. If the vegetated area is zero for a marsh unit set the value of UVVR to -1. g) DISSOLVE(Input features=UVV_poly_diss.shp; Dissolve fields=FID_CMU, gridcode; Statistics field=UVVR, ATOT_M2 and FLG with Statistics type= First for all) to obtain mu_UVVR_PIEPR.shp]. FLG flags anomalous marsh units based on absence of vegetation, elevation and surface area, and is set to (-1) no vegetated area; (-10) marsh unit elevation higher than the 99.8 percentile; (-100) marsh unit elevation less than 0.2 percentile; (-1000) marsh unit surface area less than 900 m2; and (0) no flag. Combination of negative values indicate combination of flags. For example, -1001 indicates no vegetated area and area less than 900m2. h) SELECT BY ATTRIBUTES FROM [CMU_PIEPRp] where "CLASS"= 'vegetated', and join field "APGN_M2" from CMU_PIEPRp.shp on the feature dataset [mu_UVVR_PIEPR.shp]. i) Rearrange field names and change the projection for better performance of web services with online base maps. PROJECT(Input coordinate system=NAD 1983 UTM Zone 19N; Output coordinate system=WGS 1984 Web Mercator Auxiliary Sphere; Geographic transformation=WGS 1984 (ITRF00) to NAD 1983) the feature dataset to obtain the final conceptual marsh units [mu_UVVR_PIEPRp.shp]. Source_Used_Citation_Abbreviation: elev_mosaic Source_Used_Citation_Abbreviation: CMU_PIEPRp Source_Used_Citation_Abbreviation: NAIP Process_Date: 2018 Source_Produced_Citation_Abbreviation: mu_UVVR_PIEPRp Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20200806 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov 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: 1230 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: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: mu_UVVR_PIEPRp Entity_Type_Definition: Attribute information associated with the UVVR in marsh units of PIEPR 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 features. Attribute: Attribute_Label: FID_CMU Attribute_Definition: Sequential whole number that represents the identification number for each conceptual marsh units. These numbers are duplicated when a marsh unit has both vegetated and unvegetated sub-polygons. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1229 Attribute_Units_of_Measure: none Attribute: Attribute_Label: ATOT_M2 Attribute_Definition: Total surface area of a marsh unit in square meters Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.699117 Range_Domain_Maximum: 814996.616952 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 Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0 Range_Domain_Maximum: 782582.767657 Attribute_Units_of_Measure: square meters Attribute: Attribute_Label: UVVR Attribute_Definition: Ratio of unvegetated surface area to vegetated surface area. Originally UVVR ranges from zero (completely vegetated) to infinity (completely unvegetated), however it is assigned the value of -1 when completely unvegetated. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -1.0 Range_Domain_Maximum: 30.2723296573 Attribute_Units_of_Measure: None Attribute: Attribute_Label: FLG Attribute_Definition: Marsh unit flag indicating anomalous marsh units based on absence of vegetation, elevation and surface area. FLG values indicate: (-1) no vegetated area; (-10) marsh unit elevation higher than the 99.8 percentile; (-100) marsh unit elevation less than 0.2 percentile; (-1000) marsh unit surface area less than 900 m2; and (0) no flag. Combination of negative values indicate combination of flags. For example, -1001 indicates no vegetated area and area less than 900m2. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -1010 Range_Domain_Maximum: 0 Attribute_Units_of_Measure: None Overview_Description: Entity_and_Attribute_Overview: In this dataset, the salt marsh complex PIEPR has been delineated to conceptual salt marsh units to facilitate unit by unit evaluation of response and resiliency of marsh system to physical and biogeochemical drivers. Each unit is also analyzed based on the vegetated and unvegetated surface area coverage, the ratio of which can be an independent measure of marsh health for microtidal marshes on the Atlantic and Pacific coasts of the United States. UVVR is calculated as the ratio of unvegetated area to vegetated area in a marsh unit. Decimal values in the attribute table are a result of double precision calculations while significant digits are considered in defining the attribute measurement resolutions. Therefore, the smallest unit increment for area values and UVVR is assumed to be 1 meter and a 0.001, respectively. 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: mu_UVVR_PIEPRp Distribution_Liability: 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. Not for navigational use. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Shapefile Format_Version_Number: ArcGIS 10.5.1 Format_Information_Content: This zipped file contains a polygon shapefile and its components, a style layer descriptor file, metadata in xml, txt and html formats and a browse image. Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5b622a13e4b006a11f6f84c5 Network_Resource_Name: https://doi.org/10.5066/P9OW6LFU 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/5b622a13e4b006a11f6f84c5?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/5b622a13e4b006a11f6f84c5?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: 20200806 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Zafer Defne Contact_Position: Ocean Scientist 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 x2254 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: zdefne@usgs.gov Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998