Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2018 Title: Massachusetts Bay and adjacent land: Polygon boundaries for source data of a continuous bathymetry and topography terrain model of the Massachusetts coastal zone and continental shelf: (Esri polygon shapefile, Geographic, NAD 83). Edition: 1.0 Geospatial_Data_Presentation_Form: Vector Digital Data Set (Polygon) Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F72806T7 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: https://doi.org/10.5066/F72806T7 Online_Linkage: https://www.sciencebase.gov/catalog/item/5a464a57e4b0d05ee8c05491 Larger_Work_Citation: Citation_Information: Originator: Brian D. Andrews Originator: Wayne E. Baldwin Originator: Daniel W. Sampson Originator: William C. Schwab Publication_Date: 2018 Title: Continuous bathymetry and elevation models of the Massachusetts coastal zone and continental shelf Edition: 1.0 Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F72806T7 Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Andrews, B.D., Baldwin, W.E., Sampson, D.W., and Schwab, W.C., 2018, Continuous bathymetry and elevation models of the Massachusetts coastal zone and continental shelf: U.S. Geological Survey data release, https://doi.org/10.5066/F72806T7. Online_Linkage: https://doi.org/10.5066/F72806T7 Online_Linkage: https://www.sciencebase.gov/catalog/item/5a451a3ce4b0d05ee8bedfdc Description: Abstract: Integrated terrain models covering 16,357 square kilometers of the Massachusetts coastal zone and offshore waters were built to provide a continuous elevation and bathymetry terrain model for ocean planning purposes. The area is divided into the following four geographical areas to reduce file size and facilitate publishing: Massachusetts Bay from the Massachusetts-New Hampshire border south to Provincetown and Scituate and east to Stellwagen Bank; Cape Cod Bay from Provincetown to Scituate and south to Hyannis; Buzzards Bay from the Cape Cod Canal southwest to the State border including the Elizabeth Islands and extending north to Fall River and Mount Hope Bay; and Nantucket and Vineyard Sounds, from Hyannis south to the border of the Massachusetts Coastal zone approximately 8 kilometers south of Nantucket. A Triangulated Irregular Network was created from public-domain bathymetric and LiDAR data using the ArcGIS terrain-model framework and then interpolated into a 32-bit GeoTiff of 10 meter resolution. The grids for each of the four geographical areas are referenced to the Universal Transverse Mercator, Zone 19, North American Datum of 1983 coordinate system, and the North American Vertical Datum of 1988. A polygon shapefile recording the source datasets accompanies each of the four grids. Purpose: The purpose of this polygon feature class is to identify the spatial extent and provenance of the source data used to create the continuous elevation surface. In addition the shapefile will also provide an inventory of the most recent elevation and bathymetry datasets within the Massachusetts coastal zone and offshore water and identify areas of the offshore waters that are only covered by historical lead-line soundings and should be updated by using new survey methods. Supplemental_Information: This shapefile should be used in conjunction with "MassBay_10m.tif" to understand the collection date, and spatial resolution of the source data are variable and should be considered when using this raster for analysis at fine scales. The attribute table of the “MassBay_Source.shp” provides details about the collection date, and web address of the source data. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1940 Ending_Date: 2014 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -71.121763 East_Bounding_Coordinate: -69.770803 North_Bounding_Coordinate: 42.878848 South_Bounding_Coordinate: 42.118673 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:5a464a57e4b0d05ee8c05491 Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Massachusetts Office of Coastal Zone Management Theme_Keyword: CZM Theme_Keyword: National Ocean Service Theme_Keyword: NOS Theme_Keyword: National Oceanic and Atmospheric Administration Theme_Keyword: NOAA Theme_Keyword: U.S. Army Corps of Engineers Theme_Keyword: USACE Theme_Keyword: shapefile Theme_Keyword: LiDAR Theme_Keyword: multibeam Theme_Keyword: swath bathymetry Theme_Keyword: echosounder Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: boundaries Theme_Keyword: inlandwaters Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: bathymetry Theme_Keyword: sea-floor characteristics Theme_Keyword: digital elevation models Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: United States of America Place_Keyword: Commonwealth of Massachusetts Place_Keyword: Essex County Place_Keyword: Suffolk County Place_Keyword: Norfolk County Place_Keyword: Plymouth County Place_Keyword: Gulf of Maine Place_Keyword: Ipswich Bay Place_Keyword: Massachusetts Bay Place_Keyword: Boston Harbor Place_Keyword: Plymouth Bay Place_Keyword: Cape Ann Place_Keyword: Salem Harbor Place_Keyword: Stellwagen Bank Place_Keyword: Stellwagen Bank National Marine Sanctuary Temporal: Temporal_Keyword_Thesaurus: none Temporal_Keyword: 1940 Temporal_Keyword: 1941 Temporal_Keyword: 1945 Temporal_Keyword: 1952 Temporal_Keyword: 1967 Temporal_Keyword: 1995 Temporal_Keyword: 2000 Temporal_Keyword: 2001 Temporal_Keyword: 2003 Temporal_Keyword: 2004 Temporal_Keyword: 2005 Temporal_Keyword: 2006 Temporal_Keyword: 2007 Temporal_Keyword: 2009 Temporal_Keyword: 2010 Temporal_Keyword: 2011 Temporal_Keyword: 2013 Temporal_Keyword: 2014 Access_Constraints: None. Use_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information. Users are advised to read the data set's metadata thoroughly to understand appropriate use and data limitations. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Brian Andrews Contact_Organization: U.S. Geological Survey Contact_Position: Geographer Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x2348 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bandrews@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/5a464a57e4b0d05ee8c05491?name=MassBay_Source.jpg Browse_Graphic_File_Description: Image of source data boundaries for terrain model of Massachusetts Bay and surrounding elevations. File is located in the compressed zip file. Browse_Graphic_File_Type: JPEG Data_Set_Credit: Please recognize the U.S. Geological Survey (USGS) as the source of this information. Native_Data_Set_Environment: Version 6.2 (Build 9200) ; Esri ArcGIS 10.3.1.4959 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted. Logical_Consistency_Report: Polygon boundaries were created to outline the spatial extents of each input data source for the terrain model. The boundaries for the LiDAR and multibeam data were created by converting the boundary of the raster data to a polygon. The boundaries for the historical NOS sounding data were created by digitizing a boundary polygon around the extent for each of the datasets such that adjacent polygons do not overlap. The perimeter boundary of all four polygon datasets published in this data release were designed to overlap in order to create a seamless surface if the resulting GeoTIFFs are mosaicked together. General guidelines were established for the selection of the source elevation data, but for such a large area and complicated series of possible input datasets, the same source dataset may not have been chosen – therefore areas of overlap of the four individual datasets (BuzzBay_Source, CapeCodBay_Source , MassBay_Source, and Ntk_VS_Source) may not indicate the same source dataset. Completeness_Report: The individual polygons only delineate the extent of data used to compile the terrain model and may not include all the data collected during the individual survey. Gaps exist between adjacent polygons. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: This polygon shapefile was generated by a combination of digitizing around actual sounding data, and converting rasters to polygons. Each feature in the shapefile encompasses the extent of each input dataset. The horizontal accuracy is dependant on the accuracy of the input dataset, and the scale used to digitize/edit the polygon features. Lineage: Process_Step: Process_Description: PROCESS STEP 1: CREATE EMPTY POLYGON FEATURE CLASS TO STORE THE OUTLINES OF ALL THE SOURCE DATA. Create an empty polygon feature class within a file geodatabase using the context menu in ArcCatalog (v. 10.3.1). Projection is set to UTM Zone 19 NAD 83. Add the following fields to the new feature class using the "add field" menu in the attribute table view: Source, SurvYear, PubLink, SourceType. All processing steps were completed by Brian Andrews. Process_Date: 201706 Source_Produced_Citation_Abbreviation: MassBay_Source (feature class) Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Brian Andrews Contact_Organization: U.S. Geological Survey Contact_Position: Geographer Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x2348 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bandrews@usgs.gov Process_Step: Process_Description: PROCESS STEP 2: CREATE POLYGON BOUNDARY FILES FOR ALL LiDAR DATA. An 8-bit integer raster was created for each source LiDAR GeoTIFF listed in "Step 2" of the MassBay_10m.tif metadata using the grid query "Value less than 1000." The resulting integer raster was converted to polygon using the Raster to Polygon tool in ArcGIS (v. 10.3.1). Process_Date: 201707 Source_Produced_Citation_Abbreviation: "SurveyName"_Mask Process_Step: Process_Description: PROCESS STEP 3: CREATE BOUNDARY FILES FOR SWATH AND MULITBEAM DATA. An 8-bit integer raster was created for each source swath bathymetry grid listed in "Step 3 and 4" of the MassBay_10m.tif metadata using the grid query "Value less than 0." The resulting integer raster was converted to polygon using the Raster to Polygon tool in ArcGIS (v. 10.3.1) Process_Date: 201707 Source_Produced_Citation_Abbreviation: "SurveyName"_Mask Process_Step: Process_Description: PROCESS STEP 4: CREATE BOUNDARY FILES FOR ALL HISTORICAL NOS SOUNDING DATA. Create an empty polygon feature class for each of the historical NOS surveys using the context menu in ArcCatalog (v. 10.3.1). Projection is set to UTM Zone 19, NAD 83 (2011). Edit each of the polygons and digitize a boundary that encompasses all the input soundings. Process_Date: 201707 Source_Produced_Citation_Abbreviation: "SurveyName"_Mask Process_Step: Process_Description: PROCESS STEP 5: CLIP AND MERGE THE SOURCE POLYGONS INTO ONE FEATURE CLASS. This process was completed in three basic steps based on a data hierarchy using both qualitative and quantitative comparison between datasets in any areas of overlap. Starting with the LiDAR data, the individual polygons for each of the LiDAR surveys were compared for areas of overlap. In areas of overlap the newest LiDAR data with highest quality was generally used to clip (remove) overlapping older data used to create the terrain model. Qualitative criteria for determining which data to keep in areas of overlap included data density, data collection date, and data quality (are survey line artifacts visible). For example, along the south shore of Cape Cod, overlap exists between the 2007 and 2010 Army Corps of Engineers surveys. The full extent of the 2010 survey was used to clip (remove), the areas from the 2007 polygon because the 2010 data were more recent. The resulting clipped polygons were used later to extract the desired data for export as multipoint feature classes into the feature dataset used to create the terrain model. The vertical difference between overlapping raster data (LiDAR, swath, or multibeam) was used as a quantitative criteria for determining which data to retain in areas of overlap. Once these comparisons were conducted the polygons were clipped, then appended to the "MassBay_Source" feature class created in Step 1 above. Second, the polygons for swath and multibeam created in Step 3 above were clipped and appended to the "MassBay_Source" feature class in a similar manner as the LiDAR polygons. Polygon masks of newer multibeam data were used to clip older survey data in the areas of overlap. The final polygons representing swath and multibeam data were used later to extract the desired depth data for export as multipoint feature classes to create the terrain model. Each source survey was exported as a separate multipoint, or simple point, feature class to facilitate data management. Finally, the polygons for each of the historical NOS surveys from Step 4 above were compared in areas of overlap with newer multibeam or LiDAR data and clipped to remove older historical sounding data. During the clip process, an additional buffer of 50 to 100 meters was applied using the "Buffer Distance" in the ArcGIS Clip Tool under the Edit Menu. This 50-100 meter gap created a smoother transition during the gridding process between high resolution data (LiDAR and multibeam) and low resolution data (historical NOS soundings). These edited polygons were then used to extract the desired sounding data for export as point feature class into the Terrain Model feature data set. The final polygons for each survey were appended to the "MassBay_Source" feature class. Source_Used_Citation_Abbreviation: "SurveyName"_Mask Process_Date: 201707 Source_Produced_Citation_Abbreviation: MassBay_Source Process_Step: Process_Description: PROCESS STEP 6: EXPORT FEATURE CLASS TO SHAPEFILE. Finally, exported the MassBay_Source feature class into a Esri Shapefile using the context menu in ArcCatalog (v. 10.3.1). The projection of the output shapefile was set to Geographic NAD 83 during the export process. Source_Used_Citation_Abbreviation: MassBay_Source feature class Process_Date: 201707 Source_Produced_Citation_Abbreviation: MassBay_Source.shp Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20200807 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: GT-polygon composed of chains Point_and_Vector_Object_Count: 44 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: D_North_American_1983 Ellipsoid_Name: GRS 1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: MassBay_Source Entity_Type_Definition: Table containing attribute information associated with the data set. Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: Esri Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 43 Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: Source Attribute_Definition: Simplified name of the survey used as input data using either the agency acronym, and date, or in just the survey ID (NOAA). Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: character set Attribute: Attribute_Label: SurvYear Attribute_Definition: The year the survey was conducted, in some cases, the source grid included data collected during several years. In these cases, the SurvYear is the first year of the multiple surveys which are documented in the metadata for the"MassBay_10m.tif". Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1940 Range_Domain_Maximum: 2014 Attribute_Units_of_Measure: Year Attribute: Attribute_Label: PubLink Attribute_Definition: URL to published data files and metadata for each survey. For LiDAR datasets, this is the url where the laz files were downloaded. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: character set Attribute: Attribute_Label: SourceType Attribute_Definition: Sensor or method used to collect the data Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Fathometer Enumerated_Domain_Value_Definition: refers to a digital sounding device and can include echosounders Enumerated_Domain_Value_Definition_Source: NOS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: LiDAR Enumerated_Domain_Value_Definition: LIght Detection and Range Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Multibeam Enumerated_Domain_Value_Definition: Multibeam Sonar Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Swath Enumerated_Domain_Value_Definition: Interferometric Sonar Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Swath/Multibeam Enumerated_Domain_Value_Definition: Source data used a combination of both swath interferometric, and multibeam sonars. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: singlebeam Enumerated_Domain_Value_Definition: singlebeam Sonar Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: Shape_Leng Attribute_Definition: Length of the polygon feature in meters calculated in the feature class using UTM Zone 19 meters NAD 83, before it was exported as shapefile Attribute_Definition_Source: Esri Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3758.93 Range_Domain_Maximum: 3197593.74416 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Shape_Area Attribute_Definition: Area of feature in meters squared calculated in the feature class using UTM Zone 19 meters NAD 83, before exporting to shapefile. Attribute_Definition_Source: Esri Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 213624.365626 Range_Domain_Maximum: 600705168.056 Attribute_Units_of_Measure: meters squared 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 Country: USA Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: MassBay_Source.zip: file contains the polygon feature class (MassBay_Source.shp), MassBay_Source.jpg browse graphic, and the associated FGDC CSDGM metadata in XML, HTML, FAQ, and text formats. 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: shapefile Format_Version_Number: ArcGIS (v. 10.3.1) Format_Specification: Esri polygon shapefile Format_Information_Content: This WinZip file contains the a polygon shapefile, and associated metadata for the terrain model of Massachusetts Bay File_Decompression_Technique: WinZip Transfer_Size: 20.1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5a464a57e4b0d05ee8c05491?name=MassBay_Source.zip Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5a464a57e4b0d05ee8c05491 Access_Instructions: The network resources offer the options of downloading the individual files, or accessing the landing page of the data release. Fees: None Technical_Prerequisites: To utilize this data, the user must have software capable of reading an Esri shapefile. Metadata_Reference_Information: Metadata_Date: 20200807 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Brian Andrews Contact_Organization: U.S. Geological Survey, Northeast Region Contact_Position: Geographer Contact_Address: Address_Type: mailing address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Contact_Voice_Telephone: 508-548-8700 ext. 2348 Contact_Electronic_Mail_Address: bandrews@usgs.gov Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time