Metadata: Identification_Information: Citation: Citation_Information: Originator: Kimberly K. Yates Originator: David G. Zawada Originator: Zachery W. Fehr Originator: Stephanie R. Arsenault Publication_Date: 20190722 Title: Seafloor Elevation Change From 2017 to 2018 at a Subsection of Crocker Reef, Florida Keys-Impacts from Hurricane Irma Geospatial_Data_Presentation_Form: Multimedia presentation Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/P94TY8CT Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P94TY8CT Larger_Work_Citation: Citation_Information: Originator: Kimberly K. Yates Originator: David G. Zawada Originator: Nathan A. Smiley Originator: Ginger Tiling-Range Publication_Date: 20170420 Title: Divergence of seafloor elevation and sea level rise in coral reef ecosystems Geospatial_Data_Presentation_Form: Publication Publication_Information: Publication_Place: Munich, Germany Publisher: Biogeosciences Online_Linkage: https://doi.org/10.5194/bg-14-1739-2017 Description: Abstract: The U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted research to quantify bathymetric changes at a subsection of Crocker Reef near Islamorada, Florida (FL), within a 6.1 square-kilometer area following the landfall of Hurricane Irma in September 2017. USGS staff used USGS multibeam data collected between October 10 and December 8, 2017 (Fredericks and others, 2019) and March 8-15, 2018 (Fredericks and others, 2019) to assess changes in seafloor elevation and structure in the months following the passage of Hurricane Irma. An elevation change analysis between the 2017 and 2018 USGS multibeam data was performed to quantify and map impacts to seafloor elevations and to determine elevation and volume change statistics for seven habitat types found within a subsection of Crocker Reef, FL. Purpose: These data were used to determine seafloor elevation and volume changes, from 2017 to 2018, at a subsection of Crocker Reef, FL. Supplemental_Information: Data collection of the 2017 multibeam bathymetry was completed across two separate time periods: the first leg operated from October 10 to October 28, 2017 and the second leg operated from December 5 to December 8, 2017. The 2018 multibeam bathymetry was collected in a single leg from March 8 to March 15, 2018. The multibeam data were collected using two Teledyne SeaBat T50-P multibeam echosounders, in a dual head configuration. Data were collected under Florida Keys National Marine Sanctuary permit FKNMS-2016-068. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20171010 Ending_Date: 20180315 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -80.55353627 East_Bounding_Coordinate: -80.51198579 North_Bounding_Coordinate: 24.92085740 South_Bounding_Coordinate: 24.89135910 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: marine geology Theme_Keyword: sea-floor characteristics Theme_Keyword: sea-level change Theme_Keyword: reef ecosystems Theme_Keyword: coelenterates Theme_Keyword: multibeam sonar Theme_Keyword: digital elevation models Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme_Keyword: elevation Theme_Keyword: oceans Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: seafloor elevation Theme_Keyword: sea level rise Theme_Keyword: seafloor accretion Theme_Keyword: seafloor erosion Theme_Keyword: elevation change Theme_Keyword: altimetry Theme_Keyword: submerged topography Theme: Theme_Keyword_Thesaurus: Global Change Master Science Directory Theme_Keyword: OCEAN > COASTAL PROCESSES > COASTAL ELEVATION Theme_Keyword: OCEAN > COASTAL PROCESSES > CORAL REEFS Theme_Keyword: OCEAN > COASTAL PROCESSES > EROSION Theme_Keyword: OCEAN > COASTAL PROCESSES > SEA LEVEL RISE Theme_Keyword: OCEAN > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH Theme_Keyword: DOI/USGS/CMG > COASTAL AND MARINE GEOLOGY, U.S. GEOLOGICAL SURVEY, U.S. DEPARTMENT OF INTERIOR Theme: Theme_Keyword_Thesaurus: GCMD Instrument Theme_Keyword: MBES > MULTIBEAM MAPPING SYSTEM Place: Place_Keyword_Thesaurus: Geographic Names Information System Place_Keyword: Crocker Reef Place_Keyword: Florida Keys Place_Keyword: Florida Place: Place_Keyword_Thesaurus: None Place_Keyword: Florida Reef Tract Place_Keyword: Florida Keys National Marine Sanctuary Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: submerged Stratum_Keyword: seafloor Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: 2017-2018 Access_Constraints: None Use_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of these data in future products or derivative research. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Kimberly K. Yates Contact_Organization: Southeast Region: ST. PETE COASTAL & MARINE SCIENCE CENTER Contact_Position: Research Oceanographer Contact_Address: Address_Type: mailing and physical Address: 600 4Th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: United States Contact_Voice_Telephone: 727-502-8059 Contact_Electronic_Mail_Address: kyates@usgs.gov Cross_Reference: Citation_Information: Originator: International Hydrographic Organization Publication_Date: 2008 Title: IHO Standards for Hydrographic Surveys Publication_Information: Publication_Place: 4, quai Antoine 1er B.P. 445 - MC 98011 MONACO Cedex Principauté de Monaco Publisher: International Hydrographic Bureau Other_Citation_Details: pages 15-16 Online_Linkage: https://www.iho.int/iho_pubs/standard/S-44_5E.pdf Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Datasets were visually compared by USGS staff in Esri ArcGIS Desktop Advanced Version 10.6 for identification of anomalous elevations or data inconsistencies. Logical_Consistency_Report: Data cover the area specified for this project, without any known issues. Completeness_Report: This dataset is considered complete for the information presented, as described in the abstract section. Users are advised to read the rest of the metadata record and Yates and others (2017) for additional details. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: All data were collected and processed to meet or exceed International Hydrographic Organization (IHO) Special Order Standards for positioning and depth (IHO, 2008). Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: All data were collected and processed to meet or exceed International Hydrographic Organization (IHO) Special Order Standards for positioning and depth (IHO, 2008). Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Jake J. Fredericks, Billy J. Reynolds, Andrew S. Farmer, Kimberly K. Yates, and David G. Zawada Publication_Date: 20190610 Title: Multibeam bathymetry Data Collected in October and December 2017 at Crocker Reef, the Florida Keys Geospatial_Data_Presentation_Form: Tabular digital data Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/P9EASN2O Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9EASN2O Type_of_Source_Media: bathymetry data Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20171010 Ending_Date: 20171208 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: 2017 Crocker Reef multibeam Source_Contribution: The original multibeam data used to calculate elevation and volume change statistics for a subsection of Crocker Reef from 2017 to 2018. Source_Information: Source_Citation: Citation_Information: Originator: Jake J. Fredericks, Andrew S. Farmer, Kimberly K. Yates, and David G. Zawada Publication_Date: 20190607 Title: Multibeam Bathymetry Data Collected in March 2018 at Crocker Reef, the Florida Keys Geospatial_Data_Presentation_Form: Tabular digital data Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/P93PPPHU Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P93PPPHU Type_of_Source_Media: bathymetry data Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20180308 Ending_Date: 20180315 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: 2018 Crocker Reef multibeam Source_Contribution: The original multibeam data used to calculate elevation and volume change statistics in a subsection of Crocker Reef from 2017 to 2018. Source_Information: Source_Citation: Citation_Information: Originator: Florida Fish and Wildlife Conservation Commission, Fish and Wildlife Research Institute Publication_Date: 20170113 Title: Unified Florida Reef Tract Map Version 2.0 Geospatial_Data_Presentation_Form: Shapefile Publication_Information: Publication_Place: St. Petersburg, FL Publisher: Fish and Wildlife Research Institute Online_Linkage: http://ocean.floridamarine.org/IntegratedReefMap/UnifiedReefTract.htm Type_of_Source_Media: Vector digital data Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19910101 Ending_Date: 20130101 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Habitat file Source_Contribution: This shapefile was used to divide the TIN by habitat types using Unified Classification (UC) Class Level 2. Process_Step: Process_Description: Step 1: The original 2017 Crocker Reef multibeam dataset was downloaded from https://coastal.er.usgs.gov/data-release/doi-P9EASN2O and transformed from its native World Geodetic System of 1984 (WGS84) horizontal datum and ellipsoid heights to the North American Datum of 1983 NAD83(2007) horizontal datum, North American Vertical Datum of 1988 (NAVD88), and applied the GEOID12B model using a publicly available software package from the National Oceanic and Atmospheric Administration (NOAA), called VDatum version 3.9 (https://vdatum.noaa.gov/). The transformed XYZ points were loaded into Blue Marble Global Mapper version 18.2 and gridded using the "Create Elevation Grid from 2D Vector/Lidar Data" tool in the Analysis menu. Grid spacing was manually set to 1 meter (m) for the X- and Y-axes and the 'Elevation Grid No data Distance Criteria' was set to 3.0. The resultant digital elevation model (DEM) was exported as a tagged image file format (TIFF) with the following parameters: 32-bit floating point samples, Sample Spacing of 1 m for both X- and Y-axes, Always Generate Square Pixels, LZW Compression, Generate TFW (World) File, and Generate PRJ File. The original 2018 Crocker Reef multibeam dataset was downloaded from https://coastal.er.usgs.gov/data-release/doi-P93PPPHU and transformed using the same parameters. Process_Date: 2019 Process_Step: Process_Description: Step 2: Using Esri ArcGIS Desktop Advanced version 10.6, footprints of the original 2017 and 2018 multibeam data were created using the "Reclassify (Spatial Analyst)" tool in ArcToolbox. To create each raster file, all old data values were replaced with 1 and the "No Data" value with 0." Then, the "Raster to Polygon (Conversion)" tool was used to create a footprint of the original 2017 and 2018 multibeam data by converting their reclassified raster files to polygon shape (SHP) files. Process_Date: 2019 Process_Step: Process_Description: Step 3: A polygon SHP file of the geometric intersection between the 2017 and 2018 multibeam files was created with the "Intersect (Analysis)" tool by adding the 2017 and 2018 multibeam footprint SHP files (Step 2) as 'Input features,' creating the intersect_footprint SHP file. Then, the 2017 and 2018 multibeam TIFF's (Step 1) were clipped to the extent of the intersect_footprint SHP file using the "Clip (Data Management)" tool by specifying the 2017 or 2018 multibeam TIFF as the 'Input features' and the intersection_footprint SHP file as the 'Clip Features,' creating the 2017_SubsectionCrockerReef_Multibeam_Clip TIFF and the 2018_SubsectionCrockerReef_Multibeam_Clip TIFF. Process_Date: 2019 Process_Step: Process_Description: Step 4: A 2-m grid was created using the "Create Fishnet (Data Management)" tool with the following parameters: Template extent: intersect_footprint SHP file (Step 3); Cell size width: 2; Cell size height: 2; Number of Rows: left blank; Number of Columns: left blank; Geometry type: Polyline and box checked for 'Create Label Points.' The 2m_grid_label point SHP file was clipped to the extent of the intersect_footprint SHP file using the "Clip (Analysis)" tool by specifying the 2m_grid_label point SHP file as the 'Input point features' and the intersect_footprint SHP file as the 'Clip features.' XY coordinates were added to the 2m_grid_label point SHP file using the "Add XY Coordinates (Data Management)" tool. Process_Date: 2019 Process_Step: Process_Description: Step 5: Values from the 2017_SubsectionCrockerReef_Multibeam_Clip TIFF (Step 3) and 2018_SubsectionCrockerReef_Multibeam_Clip TIFF (Step 3) were extracted at the location of the 2m_grid_label point SHP file using the "Extract Values to Points (Spatial Analyst)" tool by specifying the 2m_grid_label SHP file as the 'Input point features' and the 2017_SubsectionCrockerReef_Multibeam_Clip TIFF or the 2018_SubsectionCrockerReef_Multibeam_Clip TIFF as the 'Input,' creating the 17multibeam_extract SHP file and the 18multibeam_extract SHP file. Then, the 17multibeam_extract and 18multibeam_extract SHP files were spatially joined using the "Spatial Join (Analysis)" tool with the following parameters: Target features: 18multibeam_extract; Join features: 17multibeam_extract; Join Operation: ONE_TO_ONE; Match Option: Intersect and Distance field name: left blank creating the SubsectionCrockerReef_IntersectPoints point SHP file. Process_Date: 2019 Process_Step: Process_Description: Step 6: Points with no data were removed from the SubsectionCrockerReef_IntersectPoints SHP file using the "Select by Attribute" tool to select points from the attribute table where the RASTERVALU (2018 multibeam) or the RASTERVA_1 (2017 multibeam) equaled 0. Then the "Editor Toolbox" was used to delete the points. The elevation difference (Diff_m) between the 2017 multibeam and 2018 multibeam data were calculated by adding a field to the attribute table of the SubsectionCrockerReef_IntersectPoints SHP file using the "Field Calculator" and the expression Diff_m = [RASTERVALU] - [RASTERVA_1]. Process_Date: 2019 Process_Step: Process_Description: Step 7: The original Unified Florida Reef Tract Map version 2.0 polygon SHP file was downloaded from http://ocean.floridamarine.org/IntegratedReefMap/UnifiedReefTract.htm. Using ArcGIS, the original habitat SHP file was modified using the "Clip (Analysis)" tool to clip the habitat SHP file to the extent of the Intersect_footprint (Step 3) by specifying the habitat SHP file as the 'Input Features' and the intersect_footprint SHP file as the 'Clip Features,' creating the SubsectionCrockerReef_Habitat_Clip SHP file. Using the "Union (Analysis)" tool the SubsectionCrockerReef_Habitat_Clip SHP file and intersect_footprint SHP file were merged under the following parameters, input features: SubsectionCrockerReef_Habitat_Clip and intersect_footprint; Join attributes: ALL; XY Tolerance: left blank, creating the SubsectionCrockerReef_Habitat_Clip SHP file. This creates an additional polygon in the file that includes the area of the multibeam DEM not covered by the Unified Florida Reef Tract Map. It was determined by visual analysis that the area this polygon encompasses is likely unconsolidated sediment and was labeled as such. Using the "Editing Toolbox," 'Likely Unconsolidated Sediment' was added to the attribute table of the SubsectionCrockerReef_Habitat_Clip SHP file as the Class Lv2 value of the newly created polygon. Using the "Select by Attribute" tool, individual habitat SHP files were created from the SubsectionCrockerReef_Habitat_Clip SHP file Using the "Select by Attribute" tool to select one ClassLv2 habitat and exporting it as a separate SHP file. Process_Date: 2019 Process_Step: Process_Description: Step 8: Elevation change statistics were determined by habitat type using the XYZ points from the SubsectionCrockerReef_IntersectPoints SHP file. The "Select Layer by Location (Data Management)" tool was used to extract points within or on the boundary of a specific habitat type by using the following parameters" Input Feature Layer: SubsectionCrockerReef_IntersectPoints; Relationship: INTERSECT; Selecting Features: Habitat SHP file; Search Distance: left blank; and Selection type: NEW_SELECTION. An ArcMap model was created to automate the process, because these steps had to be repeated for seven habitat types. Elevation change statistics from the Crocker Reef study site were compiled by habitat type into a comma separated values (CSV) table using Microsoft Excel 2016, see SubsectionCrockerReef_Elevation_Statistics.csv. Process_Date: 2019 Process_Step: Process_Description: Step 9: An elevation change surface model was created using the "Create TIN (3D Analyst)' tool by specifying the SubsectionCrockerReef_IntersectPoints SHP file (Step 6) as the 'Input Feature Class,' Diff_m as the 'Height Field' and Mass_Points as the 'Type,' creating the Intersect_TIN file. Then, the Intersect_TIN was delineated using the "Delineate TIN Data Areas (3D Analyst)" tool by specifying the Intersect_TIN as the 'Input TIN,' a 'Maximum Edge Length' of 2.828428 (hypotenuse of a 2-m grid) and the 'Method' set to ALL. The delineated Intersect_TIN was clipped to the extent of the intersect_footprint SHP file (Step 4) using the "Edit TIN (3D Analyst)" tool with the following parameters: Input TIN: Intersect_TIN; Input Feature Class: intersect_footprint SHP file; Height Field: None; Tag Field: None; and Type: Hard clip. Process_Date: 2019 Process_Step: Process_Description: Step 10: In addition to elevation-change statistics, volume-change statistics per habitat type were calculated. Surface volume changes were calculated for four cases using the "Surface Volume (3D Analyst)" tool. To calculate the net erosion lower limit (case 1) the 'Reference Plane' was set to BELOW and the 'Plane Height' set to -0.212 m, for the net erosion upper limit (case 2) the 'Reference Plane' was set to BELOW and the 'Plane Height' set to 0 m, for the net accretion lower limit (case 3) the 'Reference Plane' was set to ABOVE and the 'Plane Height' was set to 0.212 m, and for the net accretion upper limit (case 4) the 'Reference Plane' was set to ABOVE and the 'Plane Height' was set to 0 m. The 0.212 m threshold was determined from vertical error analysis using the uncertainties reported in the metadata of the original lidar and multibeam products. Minimum net volume change was calculated by summing results of case 1 and case 3. Maximum net volume change was calculated by summing results of case 2 and case 4. Area normalized volume changes were calculated by dividing net volume changes for each study site by its total area. Because these steps had to be repeated for seven habitat types, an ArcMap model was created to automate the process. Volume change statistics from the Crocker Reef study site were compiled by habitat type into a CSV file using Microsoft Excel 2016, see SubsectionCrockerReef_Volume_Statistics. Process_Date: 2019 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity Point Point_and_Vector_Object_Count: 1525339 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 17 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -81.0 Latitude_of_Projection_Origin: 0.0 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: North American Datum of 1983 National Spatial Reference System (2007) Ellipsoid_Name: GRS 1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum of 1988 (NAVD88) GEOID12B Altitude_Resolution: 0.2 Altitude_Distance_Units: meters Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: SubsectionCrockerReef_Elevation_Statistics.csv Entity_Type_Definition: Elevation change by habitat type at Crocker Reef, FL, from 2017 to 2018. Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: Habitat types in Crocker Reef study site Attribute_Definition: The habitat types found in the Crocker Reef study site. Habitat types are defined by the Unified Florida Reef Tract Map Version 2.0 and based on the Unified Classification (UC) system Class Level 2. Attribute_Definition_Source: Florida Fish and Wildlife Conservation Commission (FWC) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Total study site Enumerated_Domain_Value_Definition: The total Crocker Reef study site, includes 7 habitat types. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Aggregate reef Enumerated_Domain_Value_Definition: Aggregate reef larger than 1 hectare (ha), contiguous reef, lacking sand channels. Enumerated_Domain_Value_Definition_Source: FWC Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Individual or aggregated patch reef Enumerated_Domain_Value_Definition: Patch reefs smaller than 1 ha, isolated reefs often with distinct halo or reef features covering >10% of the area. Enumerated_Domain_Value_Definition_Source: FWC Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Likely unconsolidated sediment Enumerated_Domain_Value_Definition: Likely unconsolidated sediment determined by visual assessment of digital elevation models. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Pavement Enumerated_Domain_Value_Definition: Contiguous to patchy pavement, lacking spur and groove channel formations. Enumerated_Domain_Value_Definition_Source: FWC Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Pavement with sand channels Enumerated_Domain_Value_Definition: Alternating linear sand and pavement formations, perpendicular to reef crest. Enumerated_Domain_Value_Definition_Source: FWC Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Seagrass discontinuous Enumerated_Domain_Value_Definition: Discontinuous seagrass beds. Enumerated_Domain_Value_Definition_Source: FWC Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Unconsolidated sediment Enumerated_Domain_Value_Definition: Unconsolidated sediment. Enumerated_Domain_Value_Definition_Source: FWC Attribute: Attribute_Label: Total points (no.) Attribute_Definition: The total number of points within or on the boundary of each Crocker Reef habitat type. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5732 Range_Domain_Maximum: 1525339 Attribute_Units_of_Measure: number of points Attribute: Attribute_Label: Mean elevation change (m) Attribute_Definition: Mean elevation change per habitat type in the Crocker Reef study site from 2017 to 2018, in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.0155 Range_Domain_Maximum: 0.0229 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Mean elevation change SD (m) Attribute_Definition: Standard deviation of the mean elevation change, in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0569 Range_Domain_Maximum: 0.2317 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Accretion points (no.) Attribute_Definition: The total number of accretion points within or on the boundary of each Crocker Reef habitat type. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3048 Range_Domain_Maximum: 737477 Attribute_Units_of_Measure: number of points Attribute: Attribute_Label: Max accretion (m) Attribute_Definition: Maximum accretion per habitat type in the Crocker Reef study site from 2017 to 2018, in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.572 Range_Domain_Maximum: 3.5957 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Min accretion (m) Attribute_Definition: Minimum accretion per habitat type in the Crocker Reef study site from 2017 to 2018, in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.000001 Range_Domain_Maximum: 0.000004 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Mean accretion (m) Attribute_Definition: Mean accretion per habitat type in the Crocker Reef study site from 2017 to 2018, in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0383 Range_Domain_Maximum: 0.1222 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Mean accretion SD (m) Attribute_Definition: Standard deviation of the mean accretion, in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0325 Range_Domain_Maximum: 0.1461 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Erosion points (no.) Attribute_Definition: The total number of erosion points within or on the boundary of each Crocker Reef habitat type. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2684 Range_Domain_Maximum: 787862 Attribute_Units_of_Measure: number of points Attribute: Attribute_Label: Max erosion (m) Attribute_Definition: Maximum erosion per habitat type in the Crocker Reef study site from 2017 to 2018, in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -5.7582 Range_Domain_Maximum: -0.6328 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Min erosion (m) Attribute_Definition: Minimum erosion per habitat type in the Crocker Reef study site from 2017 to 2018, in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.00002 Range_Domain_Maximum: -0.000001 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Mean erosion (m) Attribute_Definition: Mean erosion per habitat type in the Crocker Reef study site from 2017 to 2018, in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.1543 Range_Domain_Maximum: -0.0461 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Mean erosion SD (m) Attribute_Definition: Standard deviation of the mean erosion, in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0383 Range_Domain_Maximum: 0.222 Attribute_Units_of_Measure: meters Detailed_Description: Entity_Type: Entity_Type_Label: SubsectionCrockerReef_Volume_Statistics.csv Entity_Type_Definition: Volume Statistics by habitat type at Crocker Reef, FL, from 2017 to 2018. Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: Habitat types in Crocker Reef study site Attribute_Definition: The habitat types found in the Crocker Reef study site. Habitat types are defined by the Unified Florida Reef Tract Map Version 2.0 and based on the Unified Classification (UC) system Class Level 2. Attribute_Definition_Source: Florida Fish and Wildlife Conservation Commission (FWC) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Total study site Enumerated_Domain_Value_Definition: The total Crocker Reef study site, includes 7 habitat types. Enumerated_Domain_Value_Definition_Source: FWC Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Aggregate reef Enumerated_Domain_Value_Definition: Aggregate reef larger than 1 hectare (ha), contiguous reef, lacking sand channels. Enumerated_Domain_Value_Definition_Source: FWC Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Individual or aggregated patch reef Enumerated_Domain_Value_Definition: Patch reefs smaller than 1 ha, isolated reefs often with distinct halo or reef features covering >10% of the area. Enumerated_Domain_Value_Definition_Source: FWC Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Likely unconsolidated sediment Enumerated_Domain_Value_Definition: Likely unconsolidated sediment determined by visual assessment of digital elevation models. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Pavement Enumerated_Domain_Value_Definition: Contiguous to patchy pavement, lacking spur and groove channel formations. Enumerated_Domain_Value_Definition_Source: FWC Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Pavement with sand channels Enumerated_Domain_Value_Definition: Alternating linear sand and pavement formations, perpendicular to reef crest. Enumerated_Domain_Value_Definition_Source: FWC Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Seagrass discontinuous Enumerated_Domain_Value_Definition: Discontinuous seagrass beds. Enumerated_Domain_Value_Definition_Source: FWC Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Unconsolidated sediment Enumerated_Domain_Value_Definition: Unconsolidated sediment. Enumerated_Domain_Value_Definition_Source: FWC Attribute: Attribute_Label: Habitat area (km^2) Attribute_Definition: Habitat areas, in kilometers (km) squared. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0229 Range_Domain_Maximum: 6.0898 Attribute_Units_of_Measure: km^2 Attribute: Attribute_Label: Net erosion lower limit (10^6 m^3) Attribute_Definition: Net erosion minimum volume per habitat, in millions of cubic meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 0.0105 Attribute_Units_of_Measure: 10^6 m^3 Attribute: Attribute_Label: Net erosion upper limit (10^6 m^3) Attribute_Definition: Net erosion maximum volume per habitat, in millions of cubic meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0006 Range_Domain_Maximum: 0.1764 Attribute_Units_of_Measure: 10^6 m^3 Attribute: Attribute_Label: Net accretion lower limit (10^6 m^3) Attribute_Definition: Net accretion minimum volume per habitat, in millions of cubic meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 0.0057 Attribute_Units_of_Measure: 10^6 m^3 Attribute: Attribute_Label: Net accretion upper limit (10^6 m^3) Attribute_Definition: Net accretion maximum volume per habitat, in millions of cubic meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0008 Range_Domain_Maximum: 0.1672 Attribute_Units_of_Measure: 10^6 m^3 Attribute: Attribute_Label: Net volume change lower limit (10^6 m^3 study area^-1) Attribute_Definition: Net volume change lower limit per habitat, in millions of cubic meters per habitat study area. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.005 Range_Domain_Maximum: 0.0002 Attribute: Attribute_Label: Net volume change upper limit (10^6 m^3 study area^-1) Attribute_Definition: Net volume change upper limit per habitat, in millions of cubic meters per habitat study area. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.0146 Range_Domain_Maximum: 0.0048 Attribute_Units_of_Measure: 10^6 m^3 study area^-1 Attribute: Attribute_Label: Area normalized volume change lower limit (10^6 m^3 km^-2) Attribute_Definition: Area normalized volume change lower limit per habitat, in millions of cubic meters per km squared. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.0097 Range_Domain_Maximum: 0.0005 Attribute_Units_of_Measure: 10^6 m^3 km^-2 Attribute: Attribute_Label: Area normalized volume change upper limit (10^6 m^3 km^-2) Attribute_Definition: Area normalized volume change upper limit per habitat, in millions of cubic meters per km squared. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.0154 Range_Domain_Maximum: 0.0234 Attribute_Units_of_Measure: 10^6 m^3 km^-2 Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Kimberly K Yates Contact_Organization: Southeast Region: ST. PETE COASTAL & MARINE SCIENCE CENTER Contact_Position: Research Oceanographer Contact_Address: Address_Type: mailing and physical Address: 600 4Th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: United States Contact_Voice_Telephone: 727-502-8059 Contact_Electronic_Mail_Address: kyates@usgs.gov Distribution_Liability: Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), 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 constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described or contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: SHP, CSV, TIF Format_Version_Number: ArcGIS 10.6, RFC 4180 Format_Specification: Esri point and polygon shapefiles, comma-separated values, tagged image file format Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P94TY8CT/data/2017_SubsectionCrockerReef_Multibeam_Clip.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P94TY8CT/data/2018_SubsectionCrockerReef_Multibeam_Clip.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P94TY8CT/data/SubsectionCrockerReef_Habitat_Clip.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P94TY8CT/data/SubsectionCrockerReef_IntersectPoints.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P94TY8CT/data/SubsectionCrockerReef_Elevation_and_Volume_Statistics.zip Fees: None Metadata_Reference_Information: Metadata_Date: 20190722 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Kimberly K.Yates Contact_Organization: Southeast Region: ST. PETE COASTAL & MARINE SCIENCE CENTER Contact_Position: Research Oceanographer Contact_Address: Address_Type: mailing and physical Address: 600 4Th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: United States Contact_Voice_Telephone: 727-502-8059 Contact_Electronic_Mail_Address: kyates@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998