Metadata: Identification_Information: Citation: Citation_Information: Originator: Julie C. Bernier Publication_Date: 20210921 Title: Coastal Features Extracted from Landsat Satellite Imagery, Northern Chandeleur Islands, Louisiana, 1984-2019 Geospatial_Data_Presentation_Form: Vector and tabular digital data Larger_Work_Citation: Citation_Information: Originator: Julie C. Bernier Publication_Date: 20210921 Title: Coastal Land-Cover and Feature Datasets Derived from Landsat Satellite Imagery, Northern Chandeleur Islands, Louisiana Series_Information: Series_Name: U.S. Geological Survey data release Issue_Identification: doi:10.5066/P9HY3HOR Publication_Information: Publication_Place: St. Petersburg, Florida Publisher: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Online_Linkage: https://doi.org/10.5066/P9HY3HOR Description: Abstract: The data release (Bernier, 2021) associated with this metadata record serves as an archive of coastal land-cover and feature datasets derived from Landsat satellite imagery at the northern Chandeleur Islands, Louisiana. To minimize the effects of tidal water-level variations, 75 cloud-free, low-water images acquired between 1984 and 2019 were analyzed. Water, bare earth (sand), vegetated, and intertidal land-cover classes were mapped from Hewes Point to Palos Island using successive thresholding and masking of the modified normalized difference water index (mNDWI), the normalized difference bare land index (NBLI), and the normalized difference vegetation index (NDVI). Vector shoreline, sand, and vegetated feature extents were extracted for each image by contouring the spectral indices using the calculated threshold values. The geographic information system (GIS) data files with accompanying formal Federal Geographic Data Committee (FGDC) metadata can be downloaded from https://doi.org/10.5066/P9HY3HOR. Purpose: Dissemination of vector data representing shoreline, sand, and vegetated feature extents derived from 52 Landsat 5 Thematic Mapper (TM), 10 Landsat 7 Enhanced Thematic Mapper Plus (ETM+) and 13 Landsat 8 Operational Land Imager (OLI) image datasets from the northern Chandeleur Islands, Louisiana. Supplemental_Information: Information about the Landsat missions, sensor and band specifications, data products, and data access can be found at https://www.usgs.gov/core-science-systems/nli/landsat. The land-cover and feature-extent datasets published in Bernier (2021) support analyses presented by Bernier and others (2021). Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 19840325 Single_Date/Time: Calendar_Date: 19860131 Single_Date/Time: Calendar_Date: 19870408 Single_Date/Time: Calendar_Date: 19871118 Single_Date/Time: Calendar_Date: 19880206 Single_Date/Time: Calendar_Date: 19880426 Single_Date/Time: Calendar_Date: 19890123 Single_Date/Time: Calendar_Date: 19891225 Single_Date/Time: Calendar_Date: 19900923 Single_Date/Time: Calendar_Date: 19910214 Single_Date/Time: Calendar_Date: 19910926 Single_Date/Time: Calendar_Date: 19920201 Single_Date/Time: Calendar_Date: 19920304 Single_Date/Time: Calendar_Date: 19921014 Single_Date/Time: Calendar_Date: 19930219 Single_Date/Time: Calendar_Date: 19930307 Single_Date/Time: Calendar_Date: 19940121 Single_Date/Time: Calendar_Date: 19941121 Single_Date/Time: Calendar_Date: 19941223 Single_Date/Time: Calendar_Date: 19950108 Single_Date/Time: Calendar_Date: 19950225 Single_Date/Time: Calendar_Date: 19951210 Single_Date/Time: Calendar_Date: 19960127 Single_Date/Time: Calendar_Date: 19960212 Single_Date/Time: Calendar_Date: 19961110 Single_Date/Time: Calendar_Date: 19980217 Single_Date/Time: Calendar_Date: 19980422 Single_Date/Time: Calendar_Date: 19990119 Single_Date/Time: Calendar_Date: 19990220 Single_Date/Time: Calendar_Date: 19990324 Single_Date/Time: Calendar_Date: 20000114 Single_Date/Time: Calendar_Date: 20000215 Single_Date/Time: Calendar_Date: 20001028 Single_Date/Time: Calendar_Date: 20010305 Single_Date/Time: Calendar_Date: 20010321 Single_Date/Time: Calendar_Date: 20010406 Single_Date/Time: Calendar_Date: 20010921 Single_Date/Time: Calendar_Date: 20011226 Single_Date/Time: Calendar_Date: 20020228 Single_Date/Time: Calendar_Date: 20021221 Single_Date/Time: Calendar_Date: 20030106 Single_Date/Time: Calendar_Date: 20030114 Single_Date/Time: Calendar_Date: 20030215 Single_Date/Time: Calendar_Date: 20030223 Single_Date/Time: Calendar_Date: 20030327 Single_Date/Time: Calendar_Date: 20031029 Single_Date/Time: Calendar_Date: 20031114 Single_Date/Time: Calendar_Date: 20040321 Single_Date/Time: Calendar_Date: 20041015 Single_Date/Time: Calendar_Date: 20050324 Single_Date/Time: Calendar_Date: 20051018 Single_Date/Time: Calendar_Date: 20060207 Single_Date/Time: Calendar_Date: 20070109 Single_Date/Time: Calendar_Date: 20070125 Single_Date/Time: Calendar_Date: 20080316 Single_Date/Time: Calendar_Date: 20090130 Single_Date/Time: Calendar_Date: 20090420 Single_Date/Time: Calendar_Date: 20100218 Single_Date/Time: Calendar_Date: 20101203 Single_Date/Time: Calendar_Date: 20101219 Single_Date/Time: Calendar_Date: 20110221 Single_Date/Time: Calendar_Date: 20111003 Single_Date/Time: Calendar_Date: 20131024 Single_Date/Time: Calendar_Date: 20131211 Single_Date/Time: Calendar_Date: 20140112 Single_Date/Time: Calendar_Date: 20140301 Single_Date/Time: Calendar_Date: 20141214 Single_Date/Time: Calendar_Date: 20150320 Single_Date/Time: Calendar_Date: 20160118 Single_Date/Time: Calendar_Date: 20160306 Single_Date/Time: Calendar_Date: 20160322 Single_Date/Time: Calendar_Date: 20161117 Single_Date/Time: Calendar_Date: 20170309 Single_Date/Time: Calendar_Date: 20171222 Single_Date/Time: Calendar_Date: 20190110 Currentness_Reference: Ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -88.916003 East_Bounding_Coordinate: -88.808818 North_Bounding_Coordinate: 30.054845 South_Bounding_Coordinate: 29.717502 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:873bc85c-24a1-447f-b433-b0d5b735f08c Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme_Keyword: imageryBaseMapsEarthCover Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: geomorphology Theme_Keyword: geospatial datasets Theme_Keyword: image collections Theme_Keyword: multispectral imaging Theme_Keyword: coastal ecosystems Theme_Keyword: land use and land cover Theme_Keyword: contouring Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Landsat Theme_Keyword: barrier island Theme_Keyword: spectral indices Theme_Keyword: Otsu thresholding Theme_Keyword: shoreline Theme_Keyword: sand Theme_Keyword: vegetated Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Louisiana Place_Keyword: Chandeleur Islands Place_Keyword: Gulf of Mexico Access_Constraints: None Use_Constraints: The U.S. Geological Survey requests that it be acknowledged as the originator of this dataset in any future products or research derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Julie C. Bernier Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727-502-8000 Contact_Electronic_Mail_Address: jbernier@usgs.gov Data_Set_Credit: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center Native_Data_Set_Environment: Microsoft Windows 10 Version 6.2 (Build 9200); Esri ArcGIS 10.6.0.8321 Cross_Reference: Citation_Information: Originator: Julie C. Bernier Originator: Jennifer L. Miselis Originator: Nathaniel G. Plant Publication_Date: 20210921 Title: Satellite-derived barrier response and recovery following natural and anthropogenic perturbations, northern Chandeleur Islands, Louisiana Series_Information: Series_Name: Remote Sensing Issue_Identification: Special Issue "New Insights into Ecosystem Monitoring Using Geospatial Techniques" Online_Linkage: https://doi.org/10.3390/rs13183779 Cross_Reference: Citation_Information: Originator: Nobuyuki Otsu Publication_Date: 1979 Title: A Threshold Selection Method from Gray-Level Histograms Series_Information: Series_Name: IEEE Transactions on Systmes, Man and Cybernetics Issue_Identification: Volume 9 Other_Citation_Details: Pages 62-66 Online_Linkage: https://doi.org/10.1109/TSMC.1979.4310076 Cross_Reference: Citation_Information: Originator: Chester W. Jackson Jr. Originator: Clark R. Alexander Originator: David M. Bush Publication_Date: 2012 Title: Gradistat: Application of the AMBUR R package for spatio-temporal analysis of shoreline change: Jekyll Island, Georgia, USA Series_Information: Series_Name: Computers & Geosciences Issue_Identification: Volume 41 Other_Citation_Details: Pages 199-207 Online_Linkage: https://doi.org/10.1016/j.cageo.2011.08.009 Online_Linkage: https://ambur.r-forge.r-project.org/ Data_Quality_Information: Logical_Consistency_Report: For each image-acquisition date, Landsat Collection 1 Level-1 Precision and Terrain (L1TP) corrected data products and Level-2 science products were downloaded from the USGS Earth Resources Observation and Science (EROS) Center Science Processing Architecture (ESPA) On Demand Interface (https://espa.cr.usgs.gov/). Completeness_Report: 193 Landsat TM, ETM+, and OLI images (Worldwide Reference System 2 [WRS-2] path 21 row 39) acquired between March 1984 and January 2019 were identified that were cloud free and, for Landsat 7 ETM+ images, were either pre-scan line corrector failure (SLC-off) or SLC-off gap free over the study area. To minimize the effects of water-level variations on land-cover classification, only images that were collected within 2 hours of predicted low tide or were collected on a rising tide with predicted water levels at time of acquisition less than mean sea level (National Ocean Service [NOS] Center for Operational Oceanographic Products and Services [CO-OPS] station 8760172, Chandeleur Light, LA) were analyzed. The resulting dataset consisted of 52 Landsat 5 TM, 10 Landsat 7 ETM+, and 13 Landsat 8 OLI images. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Geodetic accuracy of Landsat L1TP data products depend on the accuracy of the ground control points and the resolution of the digital elevation model (DEM) used. All L1TP data products and derived Level-2 science products meet pre-defined image-to-image georegistration tolerances of <= 12-meter (m) radial root mean square error (RMSE). The positional accuracy of the satellite-derived features was not systematically evaluated in this study; however, recent analyses of satellite-derived shoreline (SDS) positions extracted using similar methods to those presented here report offsets of 1/3 to 1/2 pixel (10 to 15 m) seaward of measured in-situ shoreline positions. Compared with methods that extract shoreline position from precise elevation measurements (for example, lidar or GPS surveys), SDS positions are not based on a vertical datum (for example, mean sea level or mean high water); instead, SDS positions may include intertidal areas. Lineage: Process_Step: Process_Description: For each image acquisition date, top-of-atmosphere (TOA) reflectance (reflective bands), TOA brightness temperature (BT; thermal infrared [TIR] bands), and surface reflectance-derived NDVI images were downloaded from the EROS ESPA On Demand Interface (https://espa.cr.usgs.gov/). Process_Date: 2019 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Julie C. Bernier Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727-502-8000 Contact_Electronic_Mail_Address: jbernier@usgs.gov Process_Step: Process_Description: All images were batch-processed using Spatial Model Editor in ERDAS IMAGINE 2016. The TOA and BT bands were stacked to create 7- (TM, ETM+) or 9- (OLI) band multispectral images and clipped to the study-area extent. From these composite images, two additional spectral indices, mNDWI and NBLI, were calculated. Process_Date: 2019 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Julie C. Bernier Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727-502-8000 Contact_Electronic_Mail_Address: jbernier@usgs.gov Process_Step: Process_Description: Land-cover classification was performed using progressive, automatic thresholding of spectral indices. First, Otsu's method (Otsu, 1979) for automatic histogram thresholding was applied to mNDWI images to create a binary land-water raster for each image acquisition date. Second, water area was masked from NBLI and NDVI images, and Otsu's method was applied to the masked images to create binary bare earth-"unclassed" and vegetated-"unclassed" rasters, respectively. Because thresholding was applied to masked NBLI and NDVI simultaneously, some pixels along the sand-vegetation boundary were classed as both sand and vegetated in this step. We mapped these pixels as sand using the following rule: if NBLI = sand and NDVI = vegetated, then final = sand (based on visual analysis during workflow development). Next, water, bare earth (sand), and vegetated areas were masked from mNDWI images, and Otsu's method was applied to the masked mNDWI image to separate the "submerged" and "emergent" intertidal areas. Finally, the binary land-cover images were converted to thematic rasters, merged, and single-pixel "clumps" were removed using a 3x3 majority filter to create a final land-cover raster dataset. All steps were batch-processed using the Image Processing toolbox in MATLAB version R2018a (Otsu thresholding and binary image creation) or Spatial Model Editor in ERDAS IMAGINE 2016 (spectral index masking and generation of classed land-cover rasters). Process_Date: 2019 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Julie C. Bernier Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727-502-8000 Contact_Electronic_Mail_Address: jbernier@usgs.gov Process_Step: Process_Description: Vector shoreline (representing the boundary between intertidal and open-water areas), sand, and vegetated extents were extracted by contouring the mNDWI and masked NBLI and NDVI images using the calculated Otsu thresholds. The resulting shapefiles (one per image acquisition date) were merged into 3 shapefiles (one each for shoreline, sand, and vegetated feature extents). Contouring was batch-processed using PythonWin 2.7 with Esri ArcGIS 10.5. Vector features corresponding to a minimum mapping unit of less than 5 pixels were excluded from the final dataset. Process_Date: 2020 Source_Produced_Citation_Abbreviation: nchan_shrln.shp Source_Produced_Citation_Abbreviation: nchan_sandext.shp Source_Produced_Citation_Abbreviation: nchan_vegext.shp Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Julie C. Bernier Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727-502-8000 Contact_Electronic_Mail_Address: jbernier@usgs.gov Process_Step: Process_Description: Barrier platform, beach, and vegetated widths were calculated from the intersection of the shoreline, sand, and vegetated vectors with transects spaced 300 m (10 pixels) apart alongshore. The software package AMBUR version 1.1.27 (Analyzing Moving Boundaries Using R; Jackson and others, 2012) was used to create transects perpendicular to an offshore baseline and extract feature positions along the transects. The western islands, isolated back-barrier islands that are less than 8 pixels in size, and back-barrier islands that are more than 8 pixels from the contiguous island extent were excluded from the features dataset. Feature widths were calculated in Microsoft Excel for Mac version 16.50. Feature widths were not calculated along transect 57, where the oblique nature of the back-barrier marsh island, coupled with a change in baseline orientation, caused inconsistencies in delineating feature extents. Features less than 17 m wide along-transect are considered unresolvable based on the stated 12-m RMSE for Landsat L1TP products (sqrt(12^2 + 12^2) = 16.97) and were also excluded from the final dataset. Process_Date: 2020 Source_Produced_Citation_Abbreviation: ambur_perp_transects_300m.shp Source_Produced_Citation_Abbreviation: nchan_featmetrics.csv Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Julie C. Bernier Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727-502-8000 Contact_Electronic_Mail_Address: jbernier@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 16 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -87.0 Latitude_of_Projection_Origin: 0 False_Easting: 500000.0 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: Meters 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: nchan_features.zip Entity_Type_Definition: Zip archive containing vector shoreline (nchan_shrln.shp), sand (nchan_sandext.shp), and vegetated (nchan_vegext.shp) feature extents from each of 75 Landsat image-acquisition dates in Esri shapefile (.shp) format. Entity_Type_Definition_Source: USGS 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: CONTOUR Attribute_Definition: Contour value used to delineate features based on automatic thresholding of mNDWI (shoreline), NBLI (sand), and NDVI (vegetated) indices. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Spectral index values range from -1 to 1 but were converted to signed integers ranging from -10000 to 10000 during processing. The units are dimensionless. Attribute: Attribute_Label: IMG_DATE Attribute_Definition: Image acquisition date Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Source image acquisition date written as DD-MON-YYYY (2-digit day, 3-letter month, 4-digit year) Attribute: Attribute_Label: DATE_TIME Attribute_Definition: Image acquisition date and time Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Source image acquisition date and time written as MM/DD/YYYY 00:00:00 PM Detailed_Description: Entity_Type: Entity_Type_Label: ambur_perp_transects_300m.shp Entity_Type_Definition: Cross-shore transect locations in Esri shapefile (.shp) format Entity_Type_Definition_Source: USGS 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: ID Attribute_Definition: Baseline identifier Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Unrepresentable_Domain: AMBUR-generated baseline identifier Attribute: Attribute_Label: Transect Attribute_Definition: Transect number Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 132 Attribute_Units_of_Measure: Dimensionless Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: TranSpace Attribute_Definition: Transect spacing, in meters Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 300 Range_Domain_Maximum: 300 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: TranDist Attribute_Definition: Transect length, in meters Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3500 Range_Domain_Maximum: 4500 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: Location Attribute_Definition: Location identifier (optional) Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Unrepresentable_Domain: AMBUR-generated identifier Attribute: Attribute_Label: MaxBNum Attribute_Definition: Maximum number of baselines (if applicable) Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Unrepresentable_Domain: Used to assign the order which transects are drawn if multiple baselines are present Attribute: Attribute_Label: BaseOrder Attribute_Definition: Baseline order (if applicable) Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Unrepresentable_Domain: Used if more than one baseline is present Attribute: Attribute_Label: OFFshore Attribute_Definition: Indicates baseline position (offshore or onshore) Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Baseline is located offshore of vector shorelines Enumerated_Domain_Value_Definition_Source: AMBUR Attribute: Attribute_Label: CastDir Attribute_Definition: Indicates direction (left or right) transects are cast from baseline Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: -1 Enumerated_Domain_Value_Definition: Transects are cast left of baseline position Enumerated_Domain_Value_Definition_Source: AMBUR Attribute: Attribute_Label: BASE_LOC Attribute_Definition: Location identifier (optional) Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Unrepresentable_Domain: AMBUR-generated identifier Attribute: Attribute_Label: StartX Attribute_Definition: UTM coordinates of transect starting x position Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 319282.942095 Range_Domain_Maximum: 325039.250404 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.000001 Attribute: Attribute_Label: StartY Attribute_Definition: UTM coordinates of transect starting y position Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3289009.250058 Range_Domain_Maximum: 3326250.763767 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.000001 Attribute: Attribute_Label: EndX Attribute_Definition: UTM coordinates of transect ending x position Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 316175.515168 Range_Domain_Maximum: 321539.969229 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.000001 Attribute: Attribute_Label: EndY Attribute_Definition: UTM coordinates of transect ending y position Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3290619.808313 Range_Domain_Maximum: 3323927.400654 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.000001 Attribute: Attribute_Label: Azimuth Attribute_Definition: Azimuth of transect cast Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 48.408288 Range_Domain_Maximum: 117.397400 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.000001 Attribute: Attribute_Label: Creator Attribute_Definition: AMBUR-generated descriptor Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Unrepresentable_Domain: AMBUR-generated descriptor Detailed_Description: Entity_Type: Entity_Type_Label: nchan_featmetrics.csv Entity_Type_Definition: Comma-separated values file detailing derived feature metrics for each of 75 Landsat image-acquisition dates Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: IMG_DATE Attribute_Definition: Image acquisition date Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Source image acquisition date written as DD-MON-YYYY Attribute: Attribute_Label: Transect Attribute_Definition: Transect number Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 132 Attribute_Units_of_Measure: Dimensionless Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: SHRLN_min Attribute_Definition: Distance in meters along transect from baseline to first intersection with shoreline vector. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 308.653 Range_Domain_Maximum: 4134.120 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.001 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NoData Enumerated_Domain_Value_Definition: Feature is not present along the transect. Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: SAND_min Attribute_Definition: Distance in meters along transect from baseline to first intersection with sand extent vector. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 328.031 Range_Domain_Maximum: 4158.547 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.0010 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NoData Enumerated_Domain_Value_Definition: Feature is not present along the transect. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Excl Enumerated_Domain_Value_Definition: Feature was excluded from dataset (see process step description for additional details). Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: SAND_max Attribute_Definition: Distance in meters along transect from baseline to last intersection with sand extent vector. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 378.954 Range_Domain_Maximum: 4276.354 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.001 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NoData Enumerated_Domain_Value_Definition: Feature is not present along the transect. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Excl Enumerated_Domain_Value_Definition: Feature was excluded from dataset (see process step description for additional details). Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: VEG_min Attribute_Definition: Distance in meters along transect from baseline to first intersection with vegetated extent vector. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 348.025 Range_Domain_Maximum: 3584.820 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.001 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NoData Enumerated_Domain_Value_Definition: Feature is not present along the transect. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Excl Enumerated_Domain_Value_Definition: Feature was excluded from dataset (see process step description for additional details). Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: VEG_max Attribute_Definition: Distance in meters along transect from baseline to last intersection with vegetated extent vector. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 579.304 Range_Domain_Maximum: 3675.872 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.001 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NoData Enumerated_Domain_Value_Definition: Feature is not present along the transect. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Excl Enumerated_Domain_Value_Definition: Feature was excluded from dataset (see process step description for additional details). Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: SHRLN_max Attribute_Definition: Distance in meters along transect from baseline to last intersection with shoreline vector. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 597.792 Range_Domain_Maximum: 4337.832 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.001 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NoData Enumerated_Domain_Value_Definition: Feature is not present along the transect. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Excl Enumerated_Domain_Value_Definition: Feature was excluded from dataset (see process step description for additional details). Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: ISLP Attribute_Definition: Width in meters of barrier-island platform (sea shoreline to back-barrier shoreline). Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 17.947 Range_Domain_Maximum: 1782.744 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.001 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NoData Enumerated_Domain_Value_Definition: Feature is not present along the transect. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Excl Enumerated_Domain_Value_Definition: Feature was excluded from dataset (see process step description for additional details). Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: BEACH Attribute_Definition: Width in meters of barrier-island beach (sand extent). Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 17.566 Range_Domain_Maximum: 628.044 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.001 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NoData Enumerated_Domain_Value_Definition: Feature is not present along the transect. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Excl Enumerated_Domain_Value_Definition: Feature was excluded from dataset (see process step description for additional details). Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: VEG Attribute_Definition: Width in meters of barrier-island vegetation (vegetated extent). Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 17.960 Range_Domain_Maximum: 1499.363 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.001 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NoData Enumerated_Domain_Value_Definition: Feature is not present along the transect. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Excl Enumerated_Domain_Value_Definition: Feature was excluded from dataset (see process step description for additional details). Enumerated_Domain_Value_Definition_Source: USGS Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Julie C. Bernier Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727-502-8000 Contact_Electronic_Mail_Address: jbernier@usgs.gov Resource_Description: nchan_featmetrics.csv, ambur_perp_transects_300m.shp, nchan_sandext.shp, nchan_shrln.shp, and nchan_vegext.shp Distribution_Liability: This publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Compressed (zip) archive Format_Version_Date: 2020 Format_Information_Content: This zip archive contains vector feature datasets in Esri shapefile (.shp) format, a comma-separated values (.csv) file detailing derived feature metrics, and accompanying metadata for each of 75 Landsat image-acquisition dates. File_Decompression_Technique: Unzip Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9HY3HOR/data/nchan_features.zip Fees: None, if obtained online Technical_Prerequisites: These vector datasets were created using Esri ArcGIS version 10.5 and can be opened using Esri ArcGIS version 10.0 or higher; these data may also be viewed using the free Google Earth Pro GIS viewer. Metadata_Reference_Information: Metadata_Date: 20210921 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Julie C. Bernier Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727-502-8000 Contact_Electronic_Mail_Address: jbernier@usgs.gov Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: None Metadata_Use_Constraints: The U.S. Geological Survey requests that it be acknowledged as the originator of this dataset in any future products or research derived from these data. Metadata_Security_Information: Metadata_Security_Classification_System: None Metadata_Security_Classification: Unclassified Metadata_Security_Handling_Description: None